In a second experiment, which is performed at a much higher temperature, a sample of ethanol gas and a
copper catalyst are placed in a rigid, empty 1.0 L flask. The temperature of the flask is held constant, and the
initial concentration of the ethanol gas is 0.0100 M. The ethanol begins to decompose according to the
chemical reaction represented below. CH3CH2OH(g) æCuæà CH3CHO(g) + H2(g)
The concentration of ethanol gas over time is used to create the three graphs below.
(c) Given that the reaction order is zero, one, or two, use the information in the graphs to respond to the
following
(i) Determine the order of the reaction with respect to ethanol. Justify your answer.
The order of the reaction is zero. The plot on the left is a straight 1 point is earned for the correct
line, indicating that the rate of decrease in [ethanol] is constant as choice with a valid justification. [ethanol] changes. Therefore the rate of reaction does not depend
on [ethanol].
(ii) Write the rate law for the reaction
(iii) Determine the rate constant for the reaction, including units
(d) The pressure in the flask at the beginning of the experiment is 0.40 atm. If the ethanol completely
decomposes, what is the final pressure in the flask?
Answers
Answer:
Hope this help you i try my best :)
The Order of the reaction is zero. The rate law for the reaction is rate = k[CH₃CH₂OH]⁰. The rate constant for the reaction is 4.0 x 10⁻⁶ Ms⁻¹. the final presure is 0.8 atm.
The order of the reaction is zero. The plot on tye left is a straight line, indicating that the rate is decreasing in[ ethanol] is constant as [ ethanol ] changes. Therefore the rate of the reaction does not depend on the[ethanol] because of the order of the reaction is zero the rate law for the reaction became rate = k[CH₃CH₂OH]⁰.
The rate constant can be calculate as follows:
rate = k = - Δ [ethanol] = - (0.0020-0.0100) mol/L
Δt 2000s
rate = 4.0 x 10⁻⁶ Ms⁻¹
The final pressure is 0.080 its twice the original pressure because the product represent twice as many moles of gas as reactant
your question is incomplete but most probably your full question attached below
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Related Questions
All of the following statements are true except
A. The n = 2 energy level has no d orbitals.
B. The 2p orbital set can hold a maximum of 6 electrons.
C. The s orbital has a spherical shape.
D. There are five d orbitals in a d sublevel.
E. The third main energy level can have electrons in an f subshell.
Answers
Among all the statements, statement A is incorrect that is the n = 2 energy level has no d orbitals.
How to define atomic orbitals and quantum numbers?The angular momentum quantum number (l)- The orbital form is determined by this integer with the values l = 0, 1, 2,..., n - 1.
Because of this, an orbital with n = 1 can only have one value of l, l = 0, while an orbital with n = 2 can have both l = 0 and l = 1. The orbital's overall dimensions and energy are determined by the primary quantum number. The orbital's form is determined by the l value. Subshells are formed by orbitals with the same value of l. Additionally, the angular momentum of an electron in this orbital increases with the angular momentum quantum number.
The d orbitals are the orbitals with l = 2. Then, the value of l is -
I = n-1 = 2 -1 = 1
The p orbitals are represented by the value l = 1 and not the d orbitals.
Thus, statement A in incorrect.
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how many ml of 2.50%(m/v) salt solution would contain 1.80 g of salt? note: answer to 2 significant figures only and no units!
Answers
Answer:
180 ml
Explanation:
provide a multi step synthesis to create the intended product for the listed original reactant the number of steps are provided
Answers
A synthesis reaction is a type of chemical reaction in which two or more reactants combine to form a new compound or product.
How to do synthesis reactions?In a synthesis reaction, atoms from the reactants are rearranged to form a new chemical structure, with the total number of atoms remaining the same.
Identifying the starting material or reactant, as well as the desired end product or target molecule.
Developing a plan or strategy for the synthesis, including a sequence of reactions and steps that will convert the reactant into the product.Choosing the appropriate reagents and conditions for each step of the synthesis, taking into account factors such as reactivity, solubility, and stability.Carrying out the synthesis, carefully monitoring and controlling the reactions to ensure that they proceed as planned.Isolating and purifying the product, using techniques such as crystallization, distillation, or chromatography to remove any impurities or byproducts.Characterizing the product to confirm its identity and purity, using techniques such as spectroscopy, chromatography, or X-ray crystallography.Evaluating the overall success of the synthesis, including any challenges or difficulties that were encountered and how they were overcome.To learn more about synthesis reactions refer :
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The energy distribution profile (Curve C) for the Y2 molecules is shown in the graph below forthe reaction X+yz_XY2 when it is done under certain experimental conditions Line A represents the most probable energy of the Y2 molecules; and Line B represents the activation energy Which of the following changes should be made to the graph to explain the increase in the rata of the reaction if tho only change in experimental conditions Is tho addltion of a catalyst? Linc A Llne B 1 Curve C Moladul nr Fnomy haCurve C will broaden and Line B will move to the left; because have an energy greater than the minimum more Y2 molecules wlll energy barrier energy needed to overcome the activation ninimeB will move to the left because a larger fraction of minimum energy to overcome the activatiog the Y2 molecules will have the C Curve C and Line A will move to the energy barrier: molecules will Increase; right because the average energy of the Y2 Dilline ^ will move to the right because will increase the most probable energy of the Y2 molecules
Answers
Because a greater proportion of the Y2Y2 molecules will have the required energy to break through the activation energy barrier, line B will shift to the left.
What is the name for molecules?Any group of atoms joined together by chemical bonds is referred to as a molecule. A molecule is created from any two atoms together. A compound is an organic molecule composed of atoms from several elements. Not all molecules are compounds, yet all molecules are compounds.
Why isn't salt a molecule?A substance like table salt (NaCl), which is formed of two different types of elements (sodium and chlorine), is a compound, but it is not a molecule since the connection that binds NaCl together is an ionic bond.
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Oxygen has two common molecular anions: peroxide (O22) and superoxide (02). Use an MO energy level diagram to determine the following. 18. The bond order for 02. Enter as an integer or decimal
19.The bond order for O2. Enter as an integer or decimal. 20. The bond order for O22. Enter an integer or decimal. 21. Which of these are paramagnetic? O O2
O O2-
O 022-
22. Which has the longest bond length? O O2
O O2-
O O22-
Answers
O₂ and O₂⁻ are paramagnetic while O₂²⁻ is diamagnetic. An entity is paramagnetic if it has unpaired electrons in its molecules. The chemical is diamagnetic if every electron is coupled.
A paramagnetic is what?Unpaired electrons with magnetic dipole moments are paramagnetic as a result. According to QED, an electron's magnetic moment results from its spins and orbiting motion, granting it angular velocity in the microscopic sense.
Iron is paramagnetic for what reason?Compounds that are magnetic are drawn towards the poles of magnets because they contain 1 or more lone pair of electrons. Due to the requirement of electronegativity in their orbitals, both the element iron as iron (III) are paramagnetic. The majority of the time, iron (II) also occupies the same position.
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Use your Counting Atoms Notes, Ionic and Covalent Bonding Notes, and a Periodic
Table to help you on this assignment. You may use a calculator if you need it.
Identify the coefficients and subscripts in the following formulas.
1) 3MgCl2 coefficient:
Subscript for Mg:
Subscript for Cl:
2) 4K2CO3 coefficient:
Subscript for K:
Subscript for C:
Subscript for O:
3) NaC2H3O2 coefficient:
Subscript for Na:
Subscript for C:
Subscript for H:
Subscript for
Answers
The number of mole of atoms of an element in the given compounds is written as subscripts as shown below:
1) 3 MgCl₂
coefficient: 3Subscript for Mg: 1Subscript for Cl: 22) 4 K₂CO₃:
coefficient: 4Subscript for K: 2Subscript for C: 1Subscript for O: 33) NaC₂H₃O₂
coefficient: 1Subscript for Na: 1Subscript for C: 2Subscript for H: 3Subscript for O: 2What are chemical formulas?Chemical formulas are formulas that are used to represent compounds using the symbol of the elements found in the compounds.
The moles of atoms of each element found in the compound are written as subscripts in front of the element.
The moles of the compound present are written as coefficients in front of the chemical formula of the compound.
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The molar masses of four unknown gases are shown in the table.
Molar Mass of
Unknown Gases
Gas Molar Mass
A
44 g/mol
B
20 g/mol
30 g/mol
D
32 g/mol
Which gas is likely to have the highest rate of effusion? (4 points)
Gas A
Gas B
Gas C
Gas
Answers
GAS A, Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass or that the rate of effusion of two gases = square root of the inverse of their molar masses.
How can the molar mass of an unidentified gas be determined?PV = nRT, where P is pressure (in atm), V is the volume (in L), n is the number of moles of gas, R is the universal gas constant (0.08206 Latm/molK), and T is temperature, is the formula used to calculate the molar mass (in K).
What is the molar mass of a gas whose density is 0.761 g L at STP?By dividing the mass of one mole of ammonia by the aforementioned volume, the density can now be computed. This density is somewhat lower than the ammonia density at the STP, which is equivalent to (170.4g/mol)(22.4L/mol)=0.761g/L.
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In a covalent bond, two atoms are held together by the attraction between
Answers
Answer:
In a covalent bond, two atoms are held together by the attraction between each atom and the shared electronsthe nuclei of the two atomsthe valence electrons of the two atoms. The number of covalent bonds that an atom can form depends on the number of energy levelsprotons and neutronsvalence electrons in the atom.
Explanation:
Using general tendencies and the chart given in the introduction, predict the most likely mode of decay of each of the following radioactive isotopes. Drag the appropriate items to their respective bins.
Answers
A neutron that transforms into a proton is the mode of decay that a neutron-rich nucleus will experience most frequently. Every radioactive isotope with a neutron content less than 83 decays by an electron.
How can the decay modes of an isotope be predicted?Beta decay will occur in isotopes with a N/Z ratio greater than 1, which translates to an overabundance of neutrons. Stable nuclei for elements with increased atomic numbers can be found at N/Z ratios more than 1 and as high as 1.5.
What are the alpha, beta, and gamma kinds of radioactive decay?The nucleus loses two protons during alpha decay. The nucleus either acquires or loses a proton during beta decay. No change occurs in gamma decay the atom does not change into a new element because of an increase in proton number.
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Which statements correctly describe and provide evidence for the double replacement reaction?
Answers
The statements which correctly describe and provide evidence for the double replacement reaction are:
reactants rearrange to form new productsmetal replaces a nonmetalthe cations trade placesThe correct options are A, D, and E.
What are double replacement reactions?Double replacement reactions are reactions where there is an exchange of radicals between two compounds when their solution is mixed together.
In double replacement reactions, a precipitate is always formed.
Also, the metallic ions trade places such that the cation of one compound is exchanged with the cation of the other compound.
A typical double replacement reaction is illustrated below:
AB + CD ---> AD + CB
where;
A and C are cations
B and D are anions.
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Complete question:
Which statements correctly describe and provide evidence for the double replacement reaction?
reactants rearrange to form new productsthere is a single element formeda metal replaces a nonmetala precipitate is formedthe cations trade placesA certain solid substance that is hard, has a high melting point; and is nonconducting unless melted is most likely to be A)AS B) Cr C) k DJ NaCl E)CO
Answers
Explanation:
the most likely answer here is cobalt
How can a chemical equation be balanced? Responses by using exponents to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants by using exponents to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants by using new elements to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants by using new elements to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants by using subscripts to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants by using subscripts to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants by using coefficients to adjust the number of atoms of each element so that the products have the same number of atoms of the same element as in the reactants
Answers
The balancing of chemical equations is based on the law of conservation of mass.
How could a chemical process be made to balance out? Which integers can be changed, and which cannot?
When an equation is balanced, the coefficients can only be changed (the numbers in front of molecules or atoms).
The coefficients are indicated by the numerals in front of the molecule. Subscripts are the smaller numerals found following atoms. These cannot be changed while balancing chemical equations!
How is a chemical equation brought to equilibrium?
the algebraic balancing technique. Chemical equations can be balanced by assigning algebraic variables as stoichiometric coefficients to each species in the unbalanced chemical equation.
Equations in mathematics are used to calculate the values of each of these variables
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What is the frequency of a photon of light (in Hz) that has an energy of 3.75 × 10-21 J?
5.66 × 1012 Hz
3.75 × 10-21 Hz
2.48 × 10-54 Hz
1.77 × 10-13 Hz
Answers
The energy of a photon is hv. Where h is plank's constant and v be the frequency. The frequency of a photon with an energy of 3.75 × 10⁻²¹ J is 5.66 × 10¹² Hz.
What is frequency?Frequency of a wave is the number of wave cycles per unit time. It is the inverse of the time period. Thus, has a unit of s⁻¹ which is equivalent to Hz.
Frequency of a wave is directly proportional to the energy.
The energy of a photon = hv
h is the planck constant = 6.62 × 10⁻34 J.s
Given the energy of a photon = 3.75 × 10⁻²¹ J
Thus, frequency = energy/planck's constant
= 3.75 × 10⁻²¹ J/ 6.62 × 10⁻34 J.s
= 5.66 × 10¹² Hz.
Therefore, the frequency of the photon is 5.66 × 10¹² Hz.
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The energy required to run the Calvin cycle reactions of photosynthesis comes from which two substances produced during the light-dependent reactions?
O ATP and NADPH
O ADP and PO4
O H+ and PO2
O O2 and CO2
Answers
The substances produced during the light-dependent reactions to run the Calvin cycle reactions of photosynthesis are ATP and NADPH.
Thus, the correct answer is A.
What is the Calvin cycle?The Cаlvin cycle is а cycle thаt tаkes plаce in the stromа of the chloroplаst. The primаry enzyme required for the cycle to occur is the RUBISCO or ribulose-1,5-bisphosphаte cаrboxylаse oxygenаse which is found in the stromа. It is the cycle where the ultimаte plаnt food glucose is synthesized.
The sources of energy in the Cаlvin cycle аre Аdenosine triphosphаte (АTP) аnd Nicotinаmide аdenine dinucleotide phosphаte hydrogen (NАDPH) which аre formed during the light reаction in the thylаkoid membrаne.
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Use the information in the table below to respond to the statements and questions that follow. Your answers should be in terms of principles of molecular structure and intermolecular forces. a) Draw the complete Lewis electron-dot diagram for ethyne in the appropriate cell in the table below. (1) Compound Ethanethiol Formula CH3CH2SH Ethane CH3CH3 Lewis Electron Dot Diagram HH H:C:C:S:H HH HH H:C:C:H HH HH H:C:C:0:H HH Ethanol CH3CH2OH Ethene CzH b) Which of the four molecules contains the shortest carbon-to-carbon bond? Explain. [2] c) Explain how the structure of the molecules affects the energy that is required to boil ethanol. Consider the statement " As ethanol boils energy goes into breaking C-C bonds, C-H bonds, C-o bonds and O-H bonds." Is the statement true or false? Justify your answer. [2] d) Ethanol is completely soluble in water, whereas ethanethiol has limited (significantly less) solubility in water. Account for the difference in solubilities between the two compounds in terms of intermolecular forces. [2]
Answers
The complete Lewis electron-dot diagram for ethyne is shown in the attached diagram below:
What is the lewis electron dot diagram?A lewis electron dot structure can be utilized to represent the number of bonds, the lone pairs left in the atoms, and the bonding atoms in the molecule.
Solid lines are used to represent the bonds between atoms that are directly bonded to one another and excess electrons are denoted as dot pairs and are represented next to the atoms.
As the valence electrons of each carbon atom are equal to 4 from the electronic configuration of the carbon atom. First, the total number of valence electrons in a molecule is 4 + 1 + 1 + 4 = 10.
As each carbon atom needs only 4 electrons to complete its octet. As the octet completes, the rest of the electrons are assigned as the lone pairs of atoms. But there are no lone pairs in the molecule of the ethyne.
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What is the %CO2 in ZnCO3?
Answers
Answer:
ZnCO3 solid reacts to form Zn0 solid plus CO2 gas
I need help explain why the groundwater heater system will heat up the school more then the water heater, please try to make the explaining as long as possible.
Answers
Given the fact that it consumes more water than the other system, the groundwater heater will warm the building more efficiently than the hot water system.
Explain what groundwater is.Water that is found underground in saturated regions under the surface of the earth is known as groundwater. The water table is the term for the saturated zone's top surface. Contrary to common perception, subterranean rivers are not created by groundwater.
How is ground water created?Fresh water that soaks into in the soil from precipitation or melting snow and ice is called groundwater. It is kept in the microscopic crevices (pores) underlying rocks and dirt. Nearly 95% of the government's fresh water supplies come from groundwater.
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Because pure H2 is a hazardous substance, safer and more cost effective techniques to store it as a solid for shipping purposes have been developed. One such method is the reaction represented above, which occurs at 200 degrees Celsius. Which of the following happens to H atoms in the forward reaction?
Answers
In the given reaction, hydrogen undergoes both oxidation and reduction. Hydrogen first oxidises from 0 to +1 oxidation state and then reduced to -1 in LiH.
What is oxidation?Oxidation is the process by which element combines with oxygen or loses electron forming its higher oxidation state. Whereas reduction is the process of combining with hydrogen or gaining electron to form the lower oxidation state of the element.
If an element undergoes both oxidation and reduction in the same reaction, it is called as disproportionation reaction. In the given reaction hydrogen undergoes disproportionation reaction.
In the molecular state H₂ is in 0 oxidation state and when it turns to LiNH₂, it oxidises to + 1 oxidation state and then reduces to -1 in LiH. Hence, option C is correct.
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Your question is incomplete. But your complete question probably was:
Because pure H2 is a hazardous substance, safer and more cost effective techniques to store it as a solid for shipping purposes have been developed. One such method is the reaction represented above, which occurs at 200 degrees Celsius. Which of the following happens to H atoms in the forward reaction?
Li₃N(s) + 2 H₂(g) ←→ LiNH₂(s) + 2 LiH(s)
(A) H atoms are oxidized only.
(B) H atoms are reduced only.
(C) H atoms are both oxidized and reduced.
(D) H atoms are neither oxidized nor reduced.
This element forms a red solution when it complexes with thiocyanate, and although it is not aluminum, a chloride of this element catalyzes a Friedel-Crafts alkylation. The oxide of this element is used industrially to produce ammonia in the Haber-Bosch process, and this element exists in a solid solution with carbon in its gamma variety austenite. This element is derived from the ore hematite, and its brass-colored pyrite is commonly known as "fool's gold". For 10 points, name this transition metal with chemical symbol Fe.
Answers
Based on the cues Fe is nothing but ferric which is iron.An very crimson solution containing the ion [Fe (SCN) (H 2 O) 5] results when thiocyanate ions, SCN -, are added to a solution containing iron (III) ions, such as sodium, potassium, or ammonium thiocyanate solution. 2+
In the electrophilic aromatic substitution reaction known as "Friedel-Crafts alkylation," an alkyl substituent is attached to an aromatic ring (benzene). Lewis acids, such as AlCl3 and FeCl3, catalyze these reactions and aid in the production of carbocations from alkyl halides.
The solid phase of the Haber-Bosch Process is heterogeneous catalysis. Both hydrogen and nitrogen, the reactants, are gases. They are both poured into a vessel at a high temperature and extreme pressure in the presence of iron oxide.
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Fill in the necessary reagents or products, from A through G, to complete each of the following reactions in the formation of 1-phenyl-2-butanol. A through G are single reagents or products, excluding any acid workup. CH2N2 NaBH4 followed by H30+ DIBAL-H -78 °C OH
Answers
The effective reducer sodium borohydride. It is extremely efficient at converting aldehydes and ketones into alcohols, although not having the same potency as 1-phenyl-2-butanol.
Isomerism in geometry present in 1 phenyl 2 butene?
Due to the distinct substitutions made to the two double-bonded carbons in 1-phenyl-2-butene, it can display geometric isomerism.
What does 2-butanol's functional group look like?The group of chemical substances referred to as secondary alcohols includes 2-butanol, also known as 2-butyl alcohol or 2-hydroxybutane. The typical structure of secondary alcohols is HOC(R)(R') (R,R'=alkyl, aryl), and they are substances that contain a secondary alcohol functional group. A tasteless substance, 2-butanol has no smell.
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How many photons are contained in a flash of green light (525 nm) that
contains 189 kJ of total energy?
Answers
The flash of green light 525 nm that contains 189kJ of total energy is 2.39 ×10^29 photons.
The formula below gives the energy EE of a single photon of wavelength lambda.
E = hc/λ, where c is the speed of light and h is the plank constant, with a value of 6.62607015 ×10^34.
To determine the overall number of photons n in a green light flash (525 mm) with a total energy of 189 kJ.
We'll apply the following formula.
n= Et/ E
When we enter the given values into the formula, we see that n= Et/E.
= [tex]\frac{189 *10^3}{6.62607015 *10^−34 × 3*10^8}/ 525 *10^-3[/tex]
Therefore, there are 2.39 ×10^29 photons in a green light with 189 kJ of energy.
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Convert 6.75 cm to mm
Answers
Answer: 67.5
Explanation:
Brainliest pls
Answer please the question is on the image.
Answers
The ratio of the atoms of the iridium and the platinum is; 8.86 : 1. Option B
What is the ratio of the number of atoms?We know that the atom is the smallest particle of the substances that can be able to take part in a chemical reaction. We know that in the platinum and the iridium, we both have atoms in the substances and now we would want to get the number of atoms that is in each of the elements.
Number of moles of iridium = 100g/192 g/mol = 0.52 moles
Number of moles of platinum = 900g/195 g/mol= 4.6 moles
Number of atoms in the iridium atom = 0.52 moles * 6.02 * 10^23 atoms
= 1.2 * 10^23 atoms
Number of atoms of platinum = 4.6 moles * 6.02 * 10^23 atoms
= 2.7 * 10^24 atoms
Since we have about 100g of the iridium and about 900 g of the platinum, then we have the that the ratio of the atoms of the elements is;
2.7 * 10^24 atoms: 1.2 * 10^23 atoms
= 8.86 : 1
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The total number of electrons in p orbitals in a silver atom is
A. 6
B. 10
C. 12
D. 18
E. 19
F. 22
Answers
The total number of electrons in p orbitals in a silver atom is 18.
What is the electronic configuration of silver (Ag) atom?The position of silver (Ag) in the fifth row of the periodic table, the 11th column of the periodic table, the 9th column of the transition metal, or the d block, determines the electron configuration for silver (Ag). The atomic number of silver is 47. Consequently, the final electron configuration for silver must be:
[tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{9}[/tex]
Now, the total number of electrons in p orbitals are 18.
By changing the [tex]1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6}[/tex] , either core notation or noble gas notation [Kr] can be used to write this notation. Then the configuration can be written as-
[tex][Kr] 5s^{2} 4d^{9}[/tex]
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If a precipitate forms, you have a reaction. The precipitate in this lab will be a metal. That precipitate is (more or less) reactive than your original metal?
This question has been bugging me and I just don’t know if the precipitate would be more or less reactive, please help!
Answers
More reactive metals will drive less reactive metals from out metal salt complexes. As a result, a new salt as well as the weaker metal are created.
What is a metal, exactly?Any of a group of materials known as metals that exhibit strong thermal and electrical conductivity as well as mutability, ductility, and high light reflection. Copper is an example of metal.
Why is metal so crucial?Metals have various properties, including strength, hardness, and stiffness. From a small paperclip to a huge airplane, metals may be melted and shaped in to something. They effectively conduct heat and electricity.
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how to find the average atomic mass from a data table
Answers
The average atomic mass of the element, given the data in the table is 39.095 amu
How do I determine the average atomic mass?From isotopy, we understood that the average atomic mass of elements existing in various isotopic form can be determined by the formula:
Average atomic mass = [(Mass of 1st × 1st%) / 100] + [(Mass of 2nd × 2nd%) / 100] + [(Mass of 3rd × 3rd%) / 100]
Where
1st, 2nd and 3rd are the isotopes of the element1st%, 2nd% and 3rd% are the abundance of each isotopesNow, we shall determine the average atomic mass of the element in the table as follow:
Mass of 1st = 38.96Abundance of 1st (1st%) = 93.26%Mass of 2nd = 39.96Abundance of 2nd (2nd%) = 0.01%Mass of 3rd = 40.96Abundance of 3rd (3rd%) = 6.73%Average atomic mass =?Average atomic mass = [(Mass of 1st × 1st%) / 100] + [(Mass of 2nd × 2nd%) / 100] + [(Mass of 3rd × 3rd%) / 100]
Average atomic mass = [(38.96 × 93.26) / 100] + [(39.96 × 0.01) / 100] + [(40.96 × 6.73) / 100]
Average atomic mass = 36.334 + 0.004 + 2.757
Average atomic mass = 39.095 amu
Thhus, the average atomic mass is 39.095 amu
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Which of the following steps can be used to identify a single replacement reaction? a Check whether the products are salt and water. b Check whether the reactants are an acid and a base. c Check if the ions of two compounds exchange places. d Check if one element replaces another element in a compound.
Answers
When one element in the compound has been swapped out for another, the single replacement reaction can be recognized. Option C is right as a result.
The replacement reaction is the process in which a compound is formed after a highly reactive element has replaced a low reactive element.
The reaction is listed as follows:
AX + Y X + AY
The highly reactive X causes Y to replace Y in the complex, creating the compound AX.
One element in a compound is replaced by another in a chemical reaction known as a single-displacement reaction, sometimes referred to as a single replacement reaction or exchange reaction.
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4. Electrolysis (splitting) of water.
H2O →
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Electrolysis of water produces hydrogen and oxygen gases as it's products.
What is electrolysis?
Electrolysis is defined as a process that makes of an electric current to drive a non-spontaneous chemical reaction. It is an important process for purification and extraction of metals from their ores.It makes use of an electrolytic cell in which two electrodes are present.
The two electrodes are the cathode and anode where reduction and oxidation reactions take place respectively.In the electrolysis of water hydrogen is collected at cathode and oxygen is collected at anode.
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Pure iron is not strong enough to be useful. Explain, using particle
theory, how adding carbon to iron changes its properties.
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Pure iron is not so strong to use in construction field. Addition of carbon make iron more strong and less brittle.
What is cast iron ?The useful form of iron made by incorporating carbon and traces of other metals is called cast iron. Pure form of iron is not strong enough to be useful and it is brittle.
Steel does become stronger and more durable when carbon is added to iron, but only to a certain extent. It will then grow stronger but less resilient (ie like cast iron).
Iron is made stronger by carbon by altering its crystal lattice. In terms of effect, this distortion is comparable to work hardening. Sadly, it is a very complicated impact that depends on how the steel is heat treated and precisely how much carbon is applied. Not all metals are subject to this.
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for the tlc experiment: compounds that have the affinity for the stationary phase and affinity for the mobile phase will travel the furthest.
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According to the tlc experiment, chemicals that have a low affinity for the stationary phase and a high affinity for the mobile phase will go the farthest.
A compound example is defined.A material that has been chemically linked by the joining of two or more distinct components. Sea salt (NaCl), which itself is derived first from elements sodium and chloride, as water (H2O), which is created from the components hydrogen and oxygen are two such examples of compounds.
Give an explanation of compounds.Any material composed of two or more separate chemical elements mixed together in a certain proportion is called a compound. The interaction of the elements creates chemical connections that are hard to break. Shared or exchanged electrons between atoms cause the formation of these bonds.
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