Answer: HCO3- and HPO4 2-
Explanation:the electrolytes work as a buffer which lies in 7 the less than 7 would be acidic and more than 7 would be basic. So they work as a buffer to maintain pH of 7
Devise a route to convert propene to 1-bromo-2-propanol. Specify, in order, the reagents you would use. The reaction may require more than one step. If there is more than one feasible route, show only one. Specify reagents using letters from the table, first reagent on the left. Example: ab a NBS f K2Cr207, H2SO4, k OsO4/H202 H2O, heat g Cl2, heat or light h Cl2 b H2, Pd I 1. BH3 2. H202, NaOH c H2O, H2SO4 m SOCl2, pyridine d PCC i HCI n HBr Br2 in H20 j NaOH o Br2, e The reagents are in order of use):
Propan-1-ol can also be produced by hydroboration oxidation reaction.This reaction is known as the hydroboration reaction and obeys the anti-Markovnikov rule.
B2H6 reacts with propene along with hydrogen peroxide, converting it to 1-propanol. This reaction is known as the hydroboration reaction and obeys the anti-Markovnikov rule. Propene adds to diborane to form adducts. The adduct gives 1-propanol upon oxidation.
The reagents used for the dehydration of propan-2-ol to propene are concentrated phosphoric acid or concentrated sulfuric acid. Propanone can be converted to propane-2 by reducing the ketone. A ketone is reduced to a secondary alcohol. Ketones can be reduced by hydrogenation with a Grignard reagent. To convert propene to propan-1-ol, the method of reacting propene with peroxide is used.
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which statement is true of all protiens? a)they are created by mutations in DNA b)they carry oxygen in human blood c)Their structure is related to their function d)Their main function is to cause mutations
C) Their structure is related to their function
DNA (deoxyribonucleic acid) is the genetic material of humans and almost all other organisms. mostly every cell in the human body has the same DNA. Most DNA is found in the nucleus of cells, but small amounts of DNA can also be found in the mitochondria, also called mtDNA. Mitochondria are structures within cells that convert food energy into a form the cell can use
Mutation is one of the functions of DNA. A mutation is a change in the DNA sequence of an organism. Mutation can occur because of many circumstances. Our DNA has gone through mutations that created humans out of monkeys. the evolution of mankind is because of mutation in DNA.
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what is indicator? give three examples of indicator.
Indicators are weak acids or bases that exhibit a color change as hydrogen ion concentration in a solution varies or as a solution's pH changes.
In the water, the indicators gently separate to produce ions.
The three examples of indicators are
Litmus: It is one of the naturally occurring chemical indicators. It is naturally obtained from lichens. It is usually found in form of paper strips. Paler strips are of 2 colors red and blue. Acids change the blue paler to red color whereas the base changes red paper to blue color. Some solutions don't give any color with litmus paper because they are neutral Turmeric: it is a type of natural indicator. It is used in our daily life while preparing food. Turmeric gives a yellow color when the acidic medium is the ent brownish-red red color when the basic medium is present. This effect of turmeric is due to a yellow pigment present in it known as curcumin.Vanilla extract: It is a type of olfactory indicator. It works by changing the smell when reacted. It gives a pungent smell when reacted with acid. But when the base is added to this extract the reaction is odorless. This is due to certain chemicals present in it.A thermometer that shows temperature as the height of a column of liquid is an analog device because its measurements a. change in steps. b. change continuously. c. are in degrees. d. do not rely on electric current.
For the molecule CF4, determine its Lewis structure, bonding pairs/lone pairs, electron geometry, its shape, and whether or not the molecule is polar.
The correct answers from the task given above about carbon tetrafluoride, CF4 are as follows:
a. The Lewis structure of the molecule; CF4 simply is attached.b. The bonding pairs angle of the molecule CF4 is 109°28′ and has 16 lone pairs of electrons.c. The electron geometry of CF4 is tetrahedral geometry d. The shape of carbon tetrafluoride is tetrahedral shaped.e. Carbon tetrafluoride, CF4 is a non-polar covalent molecule.What is meant by carbon tetrafluoride ( CF4 )GeO₂ is a chemical compound which is formed as a result of the chemical reaction between carbon and chlorine atoms. However, this carbon tetrafluoride, CF4 is also known as tetrafluoromethane.
In conclusion, it can be deduced from the explanation given above that carbon tetrafluoride is a chemical compound.
Complete question:
Determine the following about the molecule CF4:
a Its lewis structure,
b. Its bonding pairs/lone pairs,
c. What is its electron geometry?
d. Its shape,
e. Is carbon tetrafluoride, CF4 a polar or non-polar molecule?
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(c) A 10L box contains 41.4g of a mixture of gasses CxH8 and CxH12. The total pressure at
44°C in flask is 1.56atm. Analysis revealed that the gas mixture has 87% total carbon
and 13% total hydrogen. Find out the value of x.
Answer: To find the value of x, we need to determine the proportions of the two gases in the mixture. We can do this by using the information provided about the total carbon and hydrogen content of the mixture.
First, we need to calculate the total mass of carbon and hydrogen in the mixture. We know that the mixture contains 87% carbon and 13% hydrogen, so the total mass of carbon is 87% * 41.4 g = 36.198 g. Similarly, the total mass of hydrogen is 13% * 41.4 g = 5.382 g.
Next, we can use the ideal gas law, which states that PV = nRT, to determine the number of moles of each gas in the mixture. Here, P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in kelvin.
We know the pressure, volume, and temperature of the mixture, and we can use the atomic weights of carbon and hydrogen to calculate the number of moles of each gas. The atomic weight of carbon is 12.01 g/mol and the atomic weight of hydrogen is 1.008 g/mol.
Let's first find the number of moles of carbon in the mixture:
n(C) = (PV) / (RT)
= (1.56 atm * 10 L) / (0.08206 Latm/molK * (317.15 K))
= 0.1039 mol
Next, let's find the number of moles of hydrogen in the mixture:
n(H) = (PV) / (RT)
= (1.56 atm * 10 L) / (0.08206 Latm/molK * (317.15 K))
= 0.0161 mol
Finally, we can use the ratio of the number of moles of each gas to determine the value of x. We know that the gas mixture contains a total of 0.1039 mol of carbon and 0.0161 mol of hydrogen. The ratio of the number of moles of carbon to the number of moles of hydrogen is therefore 0.1039 mol / 0.0161 mol = 6.4.
Since we are looking for the value of x, we can express this ratio as CxH8 / CxH12. This gives us the equation:
(CxH8) / (CxH12) = 6.4
Solving this equation gives us x = 6.4, so the value of x is 6.4.
I hope this helps! Let me know if you have any questions.
How many photons are produced in a laser pulse of 0.536 J at 529 nm?
The energy produced per one photon at a wavelength of 529 nm is 3.75 × 10⁻¹⁹ J. Thus, 0.536 J corresponds to 1.42 × 10¹⁸.
What is photon?As per DE Broglie's duel nature of matter, light behave as wave as well as particle. The light particles with certain energy is called a photon. A photon has the energy of hv.
Given the wavelength = 529 nm
Energy of one photon = [tex]\frac{hc}{\lambda}[/tex]
= (6.62× 10⁻³⁴J s × 3 × 10⁸ m/s) / 529 × 10 ⁻⁹ m
= 3.75 × 10⁻¹⁹ J.
The total energy = 0.536 J
Thus, number of photons = total energy/ energy of one photon
= 0.536 / (3.75 × 10⁻¹⁹ J) = 1.42 × 10¹⁸.
Therefore, the number of photons will be 1.42 × 10¹⁸.
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Which energy transformations happen when the students close the switch on the circuit and the blades of the fan begin to spin?
Answer: When we switch on a fan, the fan converts a significant portion of the electrical energy into kinetic energy of the fan blades. Some part of electric energy is converted into heat. energy transformation will be:-
Electrical energy → Kinetic energy
Explanation:
How much heat is needed to increase the temperature of a 540.6 g sample of iron from 20°C to 84°C? The specific heat capacity of iron is 0.450 J/g · C
Answer:
The temperature of the iron sample from 20°C to 84°C is 20999.6 J.
Explanation:
To determine the amount of heat needed to increase the temperature of a substance, you can use the following formula:
Q = m * c * ΔT
Where Q is the amount of heat, m is the mass of the substance, c is the specific heat capacity of the substance, and ΔT is the change in temperature.
In your case, the mass of the iron sample is 540.6 g, the specific heat capacity of iron is 0.450 J/g · C, and the change in temperature is 84°C - 20°C = 64°C. Plugging these values into the formula, we get:
Q = 540.6 g * 0.450 J/g · C * 64°C = 20999.6 J
Therefore, the amount of heat needed to increase the temperature of the iron sample from 20°C to 84°C is 20999.6 J.
In a rural region of India, scientists collected data of different pesticide residue levels from closely located farming plots. Some of these plots used integrated pest management biopesticides, while others used chemical pesticides to control pests. The data below show levels of four pesticide residues found in tomato and cucumber crops in the two treatment plots.
By defending crops from pests and diseases and increasing yield, pesticides play a significant part in ensuring global food security.
Because some pesticides residues gather in fat, trim any excess fat from the meat, skin, and bones of poultry and fish. CHOOSING A VARIATION OF FOODS Consume a variety of foods from different sources. You will receive a better variety of nutrients as a result, and your risk of pesticide exposure will be lower. Pesticide residue testing is a procedure that determines the amounts of pesticide residue in food items by a thorough chemical and microbiological analysis, giving food producers and manufacturers assurance in the components of their products.
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The density of an object is 5g/cm^3 and the volume of the object is 10 cm^3. What is the mass of the object
The mass of the object of density 5g/cm³ and volume 10 cm³ is 50kg.
What does physics mean when it refers to density?Defining density How tightly a material is packed together is determined by its density. Its definition is "mass per unit volume". D or, the symbol for density
Density Formula: = m/V,
where is the density, m is the object's mass, and V is its volume.
The units used change depending on the calculation's use of mass and volume units. Density would be expressed in kg/cm³ if the mass is expressed in kg and the volume in cm³.
Density = mass / volume
Mass = density × volume
Mass = 5×10
Mass = 50 kg.
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A factory uses a water tank to cool one of its pieces of machinery. To keep the water cold, fresh water enters the tank at a rate of 4 kilograms per second. Water also flows out of the tank at the same rate. The tank holds 8,000 kilograms of water.
The residence time for the average water molecule in that water tank is 2,000 seconds.
What is residence time?
The amount of material in the reservoir divided by the inflow or outflow constitutes the residence time, according to definition (they are equal when the reservoir is at equilibrium). If there are several inflows or outflows, we calculate the residence time using the sum of the inflows or outflows.
In one second, 4 kilograms will be added to the tank. In other words, you divide 8,000 kilograms of water by 4, which gets you 2,000.
Therefore, the residence time for the average water molecule in that water tank is 2,000 seconds.
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Predict if the following will fully, partially, or not dissociate, when dissolved in a solution.Potassium fluoride, KF(s), a strong electrolyte
Potassium fluoride, KF(s), a strong electrolyte, fully dissociates when dissolved in a solution.
Describe electrolyte.When dissolved in water, chemicals known as electrolytes acquire a natural negative or positive electrical charge. They support a variety of bodily functions, including maintaining the harmony of fluids within and outside of your cells and regulating chemical processes.
Does sugar include electrolytes?Because glucose can aid in hydration, many people believe it must be an electrolyte. Sugar, however, isn't an electrolyte. Instead, it's a carbohydrate which fuels your body by turning glycogen reserves in your muscles into energy.
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Classify each substance as an atomic element, molecular element, molecular compound, or ionic compound.
The substances given in the task above are correctly classified as either atomic element, molecular element, molecular compound, or ionic compound as follows:
Atomic element: AgMolecular element: F₂Molecular compound: CO, PbI4.Ionic compound: noneWhat is a compound?A compound can simply be defined as a chemical substance which is formed as a result of the chemical attraction between two or more elements. In order words, a compound is made or formed from two or more elements. A compound is chemically combined together
From the task given above, Carbon monoxide, CO and Lead iodide, PbI4 are typical examples of a compound.
That being said, an atom is the smallest particle of an element which can take part in a chemical reaction. Fluorine, F₂ is an atomic element.
So therefore, we can now confirm and deduce from the explanation given above that a compound contains at least two or more different elements.
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Express the number of moles of AL, S, and O atoms numerically, separated by commas
The number of moles of Al, S, and O atoms in 5.00 moles of Al₂(SO₄)₃ is equal to 10 mol, 15 mol, and 60 mol respectively.
What is a mole?A mole can be described as a scientific unit to calculate the quantity of a given substance and generally the huge number of quantities of molecules, atoms, ions, or other particular particles.
The number of elementary units in one mole was found to be equal to 6.023 × 10 ²³ which is known as Avogadro’s number.
Given the number of moles of Al₂(SO₄)₃ = 5 mol
One mole of Al₂(SO₄)₃ contain Al = 2 moles
Then 5 mol of Al₂(SO₄)₃ contain Al = 2 × 5 = 10 mol
One mole of Al₂(SO₄)₃ contain S = 3 moles
Then 5 mol of Al₂(SO₄)₃ contain S = 3 × 5 = 15 mol
One mole of Al₂(SO₄)₃ contain Oxygen (O) = 12 moles
Then 5 mol of Al₂(SO₄)₃ contain Al = 12 × 5 = 60 mol
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Your question is incomplete, most probably the complete question was:
Calculate the number of moles of aluminum, sulfur, and oxygen atoms in 5.00 moles of aluminum sulfate, Al₂(SO₄)₃. Express the number of moles of Al, S, and O atoms numerically, separated by commas.
what is the rate constant of a reaction if rate = .2 (mol/L)s, [A] and [B] are each 3M, m=1 and n=2
Answer: [tex]7.407 \times 10^{-3} \text{ M}^{-2} \text{ s}^{-1}[/tex]
Explanation:
Note that rate is equal to [tex]k[A]^m [B]^n[/tex], where [tex]k[/tex] is the rate constant, [tex][A][/tex] and [tex][B][/tex] are the concentrations, [tex]m[/tex] is the order of reactant A, and [tex]n[/tex] is the order of reactant B.
Substituting the given values,
[tex]0.2=k(3^1)(3^2) \implies k=7.407 \times 10^{-3} \text{ M}^{-2} \text{ s}^{-1}[/tex]
identify the three components of the SN2 reaction in the correct order nucleophile, electrophile and leaving group
a. Blue, Green, Red
B. Green, Red, Blue
C. Red, Green, Blue
D. Green, blue, red
E. Blue, red, green
Red, Green, and Blue of both the SN2 reaction are the nucleophile, electrophile, and leaving group in the proper order, according to the provided statement.
What are some instances of nucleophiles?A nucleophile is a reagent that transports an electron pair. Curved-arrow notation shows the transfer of such a pair of electrons from of the nucleophilic attack to the electrophile. Negatively charged species like the NC - ion of cyanide serve as an illustration of a nucleophile.
What makes it a nucleophile?Christopher Kelk Ingold replaced the words anionoid and cationoid, first suggested by A. J. Lapworth in 1925, with nucleophile and electrophile in 1933. The Greek word o, philos, which means friend, is taken from the term nucleus to get the phrase nucleophile.
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What is the volume of a gas that had an initial volume of 73.5 mL at 0 C, and is warmed to 25C?
Answer:
The volume of a gas that had an initial volume of 73.5 mL at 0 C and is warmed to 25 C would be approximately 1837.5 mL. This is based on the Ideal Gas Law, which states that the volume of a gas is directly proportional to its temperature as long as the pressure and number of moles of the gas remain constant.
Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, 80.2ml the volume of a gas that had an initial volume of 73.5 mL at 0 °C, and is warmed to 25°C.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles. Vanderwaal gas behaves as ideal gas at low pressure and high temperature.
Mathematically the relation between volume and temperature can be given as
PV=nRT
Rearranging the equation we get
V₁÷T₁=V₂÷T₂
where,
V=Volume
T =temperature
Substituting all the given values, we get
73.5÷273=V₂÷298
V₂=80.2ml
Therefore, 80.2ml the volume of a gas that had an initial volume of 73.5 mL at 0 °C, and is warmed to 25°C.
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How many grams of ethanol, C₂H,OH, can be boiled with 564.1 kJ of heat energy? The molar heat of vaporization of ethanol is
38.6 kJ/mol.
mass of ethanol:
09
Answer: 672.2 grams
Explanation:
With 564.1 kJ of heat energy, [tex]564.1/38.6=14.613989637306[/tex] moles of ethanol can be combusted.
So, we need to find the formula mass of ethanol.
The atomic mass of carbon is 12 g/mol.The atomic mass of oxygen is 16 g/mol.The atomic mass of hydrogen is 1 g/mol.So, the formula mass of ethanol is [tex]2(12)+6(1)+16=46[/tex] g/mol.Therefore, the mass of ethanol is [tex](46)(14.613989637306)=672.2[/tex] grams.
The intermediate shown converts a ketone or aldehyde into what functional group?
A organophosphane
B alkene
C alkyne
D 1,2 -di-ketone
The intermediate shown converts a ketone or aldehyde into what functional group is Alkyne
What is meant by alkyne ?
Alkynes, a chemical compound. Alkynes are defined as molecules with a triple bond between two carbon atoms. One bond and two bonds combine to form the triple bond.
Alkynes are hydrocarbons that have triple bonds between carbon atoms. The typical formula for molecules with one triple bond is CnH2n-2 (and no rings). Alkynes undergo many of the same reactions as alkenes, but because the triple bond contains two p-bonds, they can react twice.
Due to the compound's unsaturation, two carbon atoms that form double bonds trade the excess electrons with regard to hydrogen atoms. Alkynes from the first component in the chain are additionally frequently referred to as ACETYLENES.
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you would find coffee-flavored buttercream in a . group of answer choices sacher torte mocha torte dobos torte tiramisu
You would find coffee-flavored buttercream in a mocha torte.
The essential ingredients for chocolate cake—flour, sugar, eggs, vanilla extract, baking powder, and two kinds of chocolate—are the foundation of this mocha cake recipe. I use espresso powder, which is accessible in most grocery shops' coffee aisles, to create the mocha flavor.
A torte is a dense, frequently stacked cake that has whipped cream, buttercream, mousse, jam, or fruit as its filling.
By definition, a torte is a sort of cake. They typically cost more because they use higher-quality ingredients. Their name is a translation of the German word for cake, torte. They are a specialty of Europe, and the majority of the well-known torte recipes originate here.
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Order each of the following events so that they occur in the proper order with respect to the function of the channels, ion permeability, and changes in membrane potential.1. Repolarization of the membrane2. Depolarization of the membrane to +30 mV3. K+ ion flow out of the neuron increases4. Na+ ion flow into the neuron increases5. Opening of voltage-gated Na+ channels
The correct order of in which this process happens is given below :
3. K+ ions flow out of neurons increases
5. Opening of voltage-gated Na+ channels
4. Na+ ion flow into the neuron increases
2. Depolarization of the membrane
1. Repolarization of the membrane
Hyperpolarization is when the membrane potential becomes more negative at a particular spot on the neuron’s membrane, while depolarization is when the membrane potential becomes less negative (more positive). Depolarization and hyperpolarization occur when ion channels in the membrane open or close, altering the ability of particular types of ions to enter or exit the cell.
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Which of these has lowest viscosity as a liquid? a. CH3CH2CH3b. CH3CH2NH2c. CH3OCH3d. CH3Cle. CH3CH2OH
Among the following (a) CH₃CH₂CH₃ has the lowest viscosity as a liquid.
A liquid's ability to flow is due to the fact that its molecules can move around and around each other. The degree to which a substance resists flow is referred to as its viscosity. High viscosities are exhibited by liquids such as glycerin and honey, which a very lower flow rate. Those with low viscosities, such as ether or gasoline, have excellent flow characteristics.
The magnitude of the intermolecular forces and, more specifically, the structures of the molecules that make up a liquid are what determine its viscosity. In general, liquids with molecules that are polar or that are capable of forming hydrogen bonds have a greater viscosity than comparable nonpolar substances.
(A) The intermolecular force of attraction in CH₃CH₂CH₃ is provided by hydrogen bonds. Because the hydrogen bonding is so much stronger than the dispersive force, it results in a significantly higher viscosity.
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what is the molarity of a solution made with 120 g of copper(II) chloride in enough water to make 220ml solution?
According to molar concentration, the molarity of copper(II) chloride solution is 4.054 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
Substituting values in the given formula, molarity= 120/134.45×1/0.22=4.054 M.
Thus the molarity of copper (II) chloride is 4.054 M.
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2. Jennifer uses many forms of energy to get ready for school in the
morning. Which table best matches each form of energy to Jennifer's
actions?
Form of Energy Jennifer's Action
light
turns on a lamp
makes toast
listens to the radio
plugs in coffee pot
rides her bike
JOSTAGENS
sound
O C
E
electrical
mechanical
Form of Energy Jennifer's Action
Light
rides her bike
makes toast
plugs in coffee pot
turns on a lamp
listens to the radio
sound
electrical
mechanical
S
Form of Energy Jennifer's Action
Light
listens to the radio
heat
rides her bike
sound
turns on a lamp
electrical
plugs in coffee pot
mechanical
makes toast
O D
* 20 points
Form of Energy Jennifer's Action
light
heat
sound
electrical
mechanical
makes toast
turns on a lamp
rides her bike
listens to the radio
plugs in coffee pot
The table best matches each form of energy to Jennifer's actions is A.
What is energy?Energy is defined as the capacity to labor long hours or be extremely busy without becoming exhausted. Red blood cells, which carry oxygen in the blood throughout the body, are created by vitamin B12 in the body. Your body's cells use the oxygen once it gets there to produce energy.
Electrical energy, chemical energy obtained from fuels, food, and energy derived from the sun are the major types of energy used in our homes. Everyday appliances convert electrical energy into a variety of forms, including mechanical/kinetic, sound, heat, light, and other types of electromagnetic radiation.
Thus, the table best matches each form of energy to Jennifer's actions is A.
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a carbon nanofiber network for stable lithium metal anodes with high coulombic efficiency and long cycle life
Increased Lithium Metal Metals Provided by Four Lithiophilic Nanomaterials with Multiscale Porosity, claims the statement.
How is metal produced?The first step in the manufacture of metal alloys is the extraction of the raw ore from the ground. The non-metal components are then taken out of the ore during processing, for example the rock and waste. Metal alloys are created by melting and mixing different metal parts.
Where can you utilize metal?They play a significant role in the creation of machinery for the manufacture of goods for the industrial, agricultural, and automotive sectors, including cars, trains, aircraft, rockets, and other vehicles. Steel, aluminum, and iron are the most frequently utilized metals in this area.
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Part III: To which side of a Water Molecule are these Attracted?
Magnesium
Sulfur
Iron
Chlorine
Potassium
Bromine
Calcium
Helium
Nitrogen
Part IV: Polar or Non-polar?
Cooking oil
Ionic Compounds
Sugar
Salt
A compound with H's
Insoluble in water
Soluble in water
Dissolves in water
Part V: Which one will dissolve the fastest?
1. Powdered sugar or granulated sugar?
2. In hot water or in cold water?
3. Stirred or not stirred?
4. Large particles or small particles?
Part III:
Water Molecule are Attracted to Chlorine.
What is meant by water molecule?
The water molecule is made up of two hydrogen atoms connected by a single chemical bond to an oxygen atom. Most hydrogen atoms have a proton-only nucleus.
Part IV:
Polar substances are likely to dissolve in polar solvents. For example, ionic compounds, which are very polar, are often soluble in the polar solvent water.
Which is an ionic compound?
Ionic compounds are ion compounds. These ions are atoms that gain or lose electrons, resulting in a net positive or negative charge. Metals tend to lose electrons, resulting in a net positive charge and transformation into cations. Non-metals tend to gain electrons, resulting in anions with a net negative charge.
Part V:
Powdered sugar or granulated sugar will dissolve the fastest.
Hence above given is a correct answer.
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The chemical equation for a reaction between K2Cr2O7 and HCl is shown.
K2Cr2O7 + 14HCl → 2CrCl3 + 2KCl + 3Cl2 + 7H2O
Which of the following identifies the reactant that acts as an oxidizing agent in the reaction and explains the answer?
K2Cr2O7, because the oxidation number of K changes from +6 to +3.
K2Cr2O7, because the oxidation number of Cr changes from +6 to +3.
HCl, because the oxidation number of H changes from −1 to 0.
HCl, because the oxidation number of Cl changes from −1 to 0.
Answer:
The correct answer is:
K2Cr2O7, because the oxidation number of Cr changes from +6 to +3.
Explanation:
In this reaction, K2Cr2O7 is the reactant that acts as an oxidizing agent. An oxidizing agent is a substance that causes another substance to be oxidized (to lose electrons). In this case, the oxidation number of Cr in K2Cr2O7 changes from +6 to +3 as it is oxidized by HCl. This indicates that K2Cr2O7 is acting as the oxidizing agent in the reaction.
HCl is not acting as an oxidizing agent in this reaction. The oxidation number of H in HCl does not change, and the oxidation number of Cl changes from -1 to 0, which indicates that it is being reduced (gaining electrons).
It's important to note that the concept of oxidation numbers is used to keep track of the electrons that are transferred during a chemical reaction. The oxidation number of an element in a compound is a measure of the degree to which it has been oxidized or reduced. In general, an element that has a higher oxidation number before a reaction will have a lower oxidation number after the reaction, indicating that it has been reduced, while an element with a lower oxidation number before the reaction will have a higher oxidation number after the reaction, indicating that it has been oxidized.
A 0.220 g sample of carbon dioxide has a volume of 0.50L and pressure of 0.60 atm. What is the temperature of the gas in K? (R = 0.0821)
Answer:
T=731.0 K
Explanation:
According to the Ideal Gas Law, pV=nRT where
p=pressure in atm
V=volume in L
n=moles of gas
R=Ideal Gas Constant (0.08205 [tex]\frac{L*atm}{mol*K}[/tex])
T=temperature in K
To calculate the moles of carbon dioxide, first calculate the molecular weight:
[tex]C=12.01\frac{g}{mol}\\O=16.00\frac{g}{mol}[/tex]
So,
[tex]MW\ CO_2=12.01\frac{g}{mol}+2(16.00\frac{g}{mol})=44.01\frac{g}{mol}[/tex]
Then use the molecular weight to convert grams to moles:
[tex]0.220g\ CO_2(\frac{1\ mol\ CO_2}{44.01\ g\ CO_2})=5.0x10^{-3}\ mol\ CO_2[/tex]
So, for this problem, let
p = 0.60 atm
V = 0.50 L
n = [tex]5.0x10^{-3}[/tex] moles
R = 0.0821 [tex]\frac{L*atm}{mol*K}[/tex]
So,
[tex](0.60\ atm)(0.50\ L)=(5.0x10^{-3}mol)(0.0821\frac{L*atm}{mol*K})T\\T=\frac{(0.60\ atm)(0.50\ L)}{(5.0x10^{-3}mol)(0.0821\frac{L*atm}{mol*K})}\\T=731.0\ K[/tex]
What quantity of moles of Care formed upon complete reaction of 2
according to the generic chemical reaction:
A+2 B ➡️ C
If 2 moles of B react with 1 mole of A, the quantity of moles of C that are formed upon complete reaction is 2 moles.
How mole is conserved in chemical reaction?
Because there are always the same amounts of reactants and products present in a chemical reaction, the mole is conserved. The law of conservation of mass states that the total masses of the reactants and products in a chemical reaction are equal, governs this idea.
The idea of molecular weight can be used to translate the law of conservation of mass into moles. The mass of one mole of a substance, measured in grammes, is its molecular weight. For instance, water (H2O) has a molecular weight of 18.015 g/mol, which indicates that one mole of water weighs 18.015 grammes.
The law of conservation of mass can be stated as follows when describing a chemical reaction in which two reactants, A and B, react to form two products, C and D: In the equation n(A) + n(B) = n(C) + n(D), n(A) denotes the quantity of reactant A, n(B) the quantity of reactant B, n(C) the quantity of product C, and n(D) the quantity of product D. According to this equation, there are exactly as many moles of reactants as there are of products. Because the total number of reactant and product moles stays constant throughout the reaction, this indicates that the mole is conserved in chemical reactions.
It's crucial to remember that regardless of the type of reactants or products involved, the law of conservation of mass holds true for all chemical reactions. This principle, which is a fundamental law of chemistry, is crucial for comprehending how matter behaves.
According to the problem:
In the chemical reaction A+2B=C, the quantity of moles of C that are formed upon complete reaction depends on the number of moles of A and B that are present.
According to the given information, 2 moles of B react with 1 mole of A to form C. This means that the ratio of B to A is 2:1, and the ratio of C to A is 1:1.
To determine the number of moles of C that are formed upon complete reaction, use the mole ratios to calculate the number of moles of C that are produced for every mole of A that is consumed. In this case, 1 mole of A reacts with 2 moles of B to produce 1 mole of C.
Therefore, if 2 moles of B react with 1 mole of A, the quantity of moles of C that are formed upon complete reaction is 2 moles. This is because 2 moles of B are equivalent to 1 mole of C, and the mole ratio between B and C is 2:1.
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