35.5 g of tetrachloroethane is added if 15 grams of chlorine is used with excess [tex]C_2H_2[/tex].
What is a balanced chemical equation?A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products.
Balanced chemical equation:
[tex]2Cl_2 (g) + C_2H_2 (g)[/tex] → [tex]C_2H_2Cl_4(l)[/tex]
In your case, 2 moles of chlorine gas are needed to produce 1 mole of tetrachloroethane, which implies that there's a 2:1 mole ratio between the two.
Calculating the mass of tetrachloroethane.
[tex]m[/tex][tex]C_2H_2Cl_4(l)[/tex] = [tex]15 g[/tex] [tex]Cl_2 (g)[/tex] X [tex]\frac{2 mol \;of \;Cl_2}{70 g \;Cl_2}[/tex] X [tex]\frac{1 mol \;of \;C_2H_2Cl_4(l)}{2 mol \;Cl_2}[/tex] X [tex]\frac{167.8 g \;C_2H_2Cl_4(l))}{1 mol \;C_2H_2Cl_4}[/tex]
[tex]C_2H_2Cl_4(l)[/tex] = [tex]17.75 g[/tex]
[tex]C_2H_2Cl_4(l)[/tex] = [tex]35.5 g[/tex]
Hence, 35.5 g of tetrachloroethane is added if 15 gram of chlorine is used with excess [tex]C_2H_2[/tex]
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What is effect of temperature on solubility?
detail please.
In general, solids become more soluble as the temperature increases. This is why sugar dissolves better in hot water than in cold water. The table shows three examples of the solubility (g of solute per 100 g water) of substances at different temperatures.
that's my answerWhat is the wavelength of an electromagnetic wave that has a frequency of
1.82 x 1018 Hz in a vacuum? (The speed of light in a vacuum is 3.00 × 108
m/s.)
O A. 6.07 × 109 m
OB. 5.46 × 1026 m
OC. 5.49 x 10-19 m
OD. 1.65 x 10-10 m
The wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × 10-¹⁰m.
How to calculate wavelength?The wavelength of a wave can be calculated by dividing the speed of the wave by its frequency.
According to this question, a wave has a frequency of 1.82 x 10¹⁸ Hz in a vacuum and speed of light in a vacuum is 3.00 × 10⁸ m/s.
wavelength = 3 × 10⁸ ÷ 1.82 × 10¹⁸
wavelength = 1.65 × 10-¹⁰m
Therefore, the wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × 10-¹⁰m.
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Write down the names of subatomic particles and their masses in a.m.u with their unit charges.
Subatomic particle is the smallest particle than the atom
Explanation :-
An atom consist of three subatomic particle
They are electron , proton and neutron .
Proton ( p ) it is a subatomic particle with positive chargewhich is equal to electron charge and a mass of
[tex]1.67262 \times {10}^{ - 27} kg [/tex]
Electron ( e ) It is the subatomic particle with negative charge and a mass equal to
[tex]9.109 × {10}^{ - 31}kg [/tex]
Neutrons ( n ) - It is neutral subatomic particle which is the constituent of every atomic nucleus except hydrogen . Neutrons have no electric charge and a rest mass equal to
[tex]1.67493 \times {10}^{ - 27} kg[/tex]
slightly greater than that of electron
Explanation:
INTRODUCTION:
There are 3 main subatomic particles, they are:
ElectronsProtons NeutronsThe existence of the sub-atomic particles was proved by the fact that an atom is electrically neutral but it can be made to gain a positive or a negative charge. This means that an atom must contain tiny particles, each carrying either a positive or a negative charge.
These opposing charges balance each other under ordinary conditions to make an atom electrically neutral.
ELECTRONS:
Electrons were discovered in 1897 by J.J. THOMSON when he was studying cathode rays.An electron is denoted by:
[tex] \boxed{ _ {- 1 }e {}^{0} }[/tex]
Where,
0 = represents it's mass-1 = represents it's unit negative electrically charge.Properties of electrons:
An electron is a negatively charged particleThey are an integral part of all atomsThe properties of electrons are Independent of the nature of the gas in the discharge tubeAn electron has a mass of 9-108 x 10 g which is only 1/1837 of the mass of a hydrogen atom. Therefore, an electron is said to have negligible massAn electron carries one unit negative (-1) charge, which is equal to 1-602 x 10 coulombs.UNIT CHARGE OF Electrons:
9.1 × 10^(-28) gramsNEUTRONS:
In 1932, James chadwick discovered neutrons & it had no charge. Its denoted as [tex] _{0} n ^1[/tex]
PROPERTIES OF NEUTRONS:
Electrically a neutron is neutral, i.e it has no chargeNeutrons are present in the nucleus of an atomAtoms of the same element may differ in the number of neutrons leading to formation of isotopes.An atom of hydrogen contains only 1 proton and one electron but no neutron.
UNIT CHARGE OF IT:
1.676 × 10^(-24) gramsPROTONS:
An atom is electrically neutral Therefor the presence of the negatively charger electrons in an atom suggests that it must contain positively charged particles a well, otherwise an atom would not b electrically neutral.It is discovered by E. GOLDSTEIN.
It's denoted as [tex] _{+1} p ^1[/tex]
where 1 represents 1 a.m.u. and +1 represents 1 unit positive charge.
PROPERTIES:
A proton is a positively charged particle.The mass of a proton is 1.672 × 10^(-19). ie equal to the mass of an atom of hydrogenA proton carries 1 unit positive (+1) charge , and equals to 1.602 × 10^(-19) coulombs.>>>All elements contains electrons & protons.
Since an atom is electrically neutral, the number of electrons in an atom is equal to the mumber of protons in that atom. However, no two elements contain the same number of protons in their respective nuclei.
UNIT Charge:
1.6 × 10^(-24) grams.[All units I provided are a.m.u. .]
[tex] \rule{225pt}{2pt}[/tex]
Hope this helps :)
Why is the bermuda triangle deadly? or is it just a myth?
Answer:
Its neither a myth nor deadly
Explanation:
Bizarre hexagonal clouds forming above the Bermuda Triangle may be the reason why dozens of ships and planes have mysteriously vanished in the notorious patch of sea, according to scientists.
According to the new theory, clouds over the Bermuda Triangle are like “air bombs” strong enough to cause ship and plane wrecks. The strange “hexagonal” shaped clouds were discovered using radar satellite imagery, which were between 20 and 50 miles wide forming over the water.
. Find the area of a circle with a
circumference
of 11 ( 3.14 )feel
?
A chemist heated a sample of steel wool in a burner flame exposed to oxygen in the air. He also heated a sample of steel wool in a container of nearly 100% oxygen. The steel wool sample in the container reacted faster than the other sample. a.Explain why.
Answer:
Explanation:
Explanation
Look at the equation that describes what is going on.
4Fe(s)+3O2(g)⟶2Fe2O3
Air is about 20% oxygen. The flame of steel wool is a gentle one since the oxygen is in limited supply.
Steel wool is about 99 % Iron. The rection above tells you that when steel wool ignites, it becomes Fe+3
Answer: The rule is the more oxygen you have, the more violent the burning process.
Grilling food creates a chemical compound known as benzo-[a]-pyrene; high levels of this compound are linked to the development of cancer. Therefore, benzo-[a]-pyrene is a/an
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon found in coal tar with the formula [tex]C_{20}H_{12}[/tex].
What is the meaning of Grilling food?Grilling involves cooking food on a rack over a heat source, usually a charcoal fire or ceramic briquettes heated by gas flames.
A chemical that comes from certain substances when they are not burned completely.
Benzo[a]pyrene (BaP) is a polycyclic aromatic hydrocarbon found in coal tar with the formula [tex]C_{20}H_{12}[/tex].
The compound is one of the benzopyrenes, formed by a benzene ring fused to pyrene, and is the result of incomplete combustion at temperatures between 300 °C (572 °F) and 600 °C (1,112 °F).
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15. Identify What types of bonds are present in an alkyne?
Answer:
Alkyne are hydrocarbons which contain carbon-carbon triple bonds.
1. How is a bicycle race like a chemical reaction? The Tour de France is one of the most famous bicycle races in the world. It is held from mid-July to early August every year. During the race, cyclists travel almost 4000 kilometers. At one stage of the race, riders must cross steep mountains with heights of 1900 meters or more. The riders need extra energy to ride through these steep mountains.
During the riding of the steep mountain, the body needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.
What is the effect of cycling?Cycling is a good exercise as swimming, while cycling, happy hormones are released like dopamine and serotonin.
The primary forces that work while cycling are gravity, friction, rolling resistance, and air resistance.
Thus, During the riding of the steep mountain, the bod needs more energy because going up consume more energy and oxygen due to additional effect of gravity on your momentum.
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true or false. you would see a partial solar eclipse if you were within the moons penumbra.
A container with two gases, helium and argon, is 30.0% helium. Calculate the partial pressure of helium and
argon if the total pressure inside the container is 4.00 atm.
Answer:
helium=1,2atm
argon=2,8atm
Explanation:
partial is pressure exerted by each gas in a system since 30% is helium it means 70% is argon
argon =70%x4
helium=30%4
Dalton's law of partial pressure is applicable to only ideal gas not to the vanderwaal gases. The partial pressure of helium and argon is 1.2atm and 2.8atm respectively.
What is Dalton's law of partial pressure?According to Dalton's law of partial pressure, the total pressure of a mixture of gases is equal to the total sum of partial pressure of individual exerting on the walls of the container.
Mathematically,
Partial pressure=total pressure× mole fraction
Total pressure= 4.00 atm
percentage of helium = 30%=0.3
percentage of argon=100-30%=70%=0.7
Substituting the given values in above equation
Partial pressure of helium=4.00 atm× 0.3
Partial pressure of helium=1.2atm
Partial pressure of argon = 4.00 atm× 0.7
Partial pressure of argon = 2.8atm
Therefore, the partial pressure of helium and argon is 1.2atm and 2.8atm respectively.
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formation of water: 2H2 + 102 --> 2H20
How many moles of H2O can be produced from 7 moles of H2?
Help me please Answer or I’ll report
Answer:
It takes 7 mol H2 to produce 7 mol H2O
Explanation:
In 2H2O, there's 2 moles of H2 for every 1 mol O2.
So, if oxygen is limiting you'd only be able to produce 2 moles of H2O. I don't know if the question implies that, so it could also be that 7 mol H2 makes 7 mol H2O. Sorry for the confusion, I hope it helps a bit
Chemical equations must be balanced to follow the____.
law of conservation of matter
hope it helps...!!!
Burning a piece of wood in fire can be best described as a
Answer:
Chemical Change
Explanation:
A chemical change is when something is turned into a new substances.
In this example the wood is being turned into ash.
7. Diethyl ether burns in air according to the following equation. C4H10O(l) + 6O2 (g) → 4CO2 (g) + 5H2O(l) If 7.15 L of CO2 is produced at a temperature of 125°C and a pressure of 1.02 atm, what volume of oxygen, measured at STP, was consumed and what mass of diethyl ether was burned?
From the stoichiometry of the combustion reaction, we can see that 7.4 L of oxygen is consumed.
What is combustion?Combustion is a reaction in which a substance is burnt in oxygen. The equation of the reaction is; C4H10O(l) + 6O2 (g) → 4CO2 (g) + 5H2O(l)
We can obtain the number of moles of CO2 from;
PV = nRT
n = 1.02 atm * 7.15 L/0.082 atm LK-1mol-1 * (125 + 273) K
n = 7.29 /32.6
n = 0.22 moles
If 6 moles of oxygen produces 4 moles of CO2
x moles of oxygen produces 0.22 moles of CO2
x = 0.33 moles
1 mole of oxygen occupies 22.4 L
0.33 moles of oxygen occupies 0.33 moles * 22.4 L/ 1 mole
= 7.4 L of oxygen
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Name these compounds according to IUPAC.
Functional groups are the specific groups that provide characteristic properties. The compounds are butanoic acid and methyl propanoate.
What are functional groups?Functional groups are the active side atoms and molecules that confer the physical and chemical properties of the compound. In the first compound, the functional group is the carboxylic acid (COOH) and four carbon atoms hence, the compound is butanoic acid.
In the second compound, the functional group is an ester (RCOOR) and contains a methyl group and other three carbon atoms making the compound, methyl propanoate.
Therefore, the compounds are butanoic acid and methyl propanoate.
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Using the rules below,select ALL compounds that are soluble
Answer:
NaNO3 is the answer of given statement
Most mechanical processing of food occurs in the _____.
Answer:
No digestion occurs in the esophagus. After passage through the esophagus, the bolus will enter the stomach and undergo mechanical and chemical digestion. Mechanical digestion in the stomach occurs via peristaltic contractions of the smooth muscle from the fundus towards the contracted pylorus, termed propulsion.
Explanation:
i hope it's help
How many moles of hydrochloric acid are needed to react with 0.64 moles of potassium permanganate?
Answer:
5.12 moles of hydrochloric acid.
Explanation:
The balanced equation is:
2KMnO4 + 16HCl ---> 2KCL + 2MnCl2 + 5Cl2 + 8H2O
So 2 moles of potassium permanganate reacts with 16 moles of HCl.
So 0.64 moles KMnO4 react with (16/2) * 0.64
= 5.12 moles.
Three elements, A, Q, and Z, have the molar masses indicated in the table below. Given a compound with a composition of 15.66% A and 84.34% Z by mass, what is the empirical formula of this compound? Remember to enter subscripts as normal numbers (ie H2O is entered as H2O) and to enter elements in the same order they were given.
element symbol molar mass
A 15.45 g/mol
Q 20.05 g/mol
Z 41.62 g/mol
The empirical formula of the compound containing 15.66% A and 84.34% Z as given from the question is AZ₂
Data obtained from the questionA = 15.66%Z = 84.34%Empirical formula =?How to determine the empirical formulaDivide by their molar mass
A = 15.66 / 15.45 = 1.014
Z = 84.34 / 41.62 = 2.026
Divide by the smallest
A = 1.014 / 1.014 = 1
Z = 2.026 / 1.014 = 2
Thus, the empirical formula of the compound is AZ₂
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What is the mass of 61.9 L of oxygen gas collected at STP?
a 122 g 02
b 2.76 g 02
C 88.4 g 02
d 44.2 g 02
Answer:
D. 44.2 g O₂
General Formulas and Concepts:
Gas Laws
Stoichiometry
Dimensional AnalysisMole RatioExplanation:
Step 1: Define
Identify given.
61.9 L O₂ at STP
Step 2: Convert
We know that the oxygen gas is at STP. Therefore, we can set up and solve for how many moles of O₂ is present:
[tex]\displaystyle 61.9 \ \text{L} \ \text{O}_2 \bigg( \frac{1 \ \text{mol} \ \text{O}_2}{22.4 \ \text{L} \ \text{O}_2} \bigg) = 2.76339 \ \text{mol} \ \text{O}_2[/tex]
Recall the Periodic Table (Refer to attachments). Oxygen's atomic mass is roughly 16.00 grams per mole (g/mol). We can use a mole ratio to convert from moles to grams:
[tex]\displaystyle 2.76339 \ \text{mol} \ \text{O}_2 \bigg( \frac{16.00 \ \text{g} \ \text{O}_2}{1 \ \text{mol} \ \text{O}_2} \bigg) = 44.2143 \ \text{g} \ \text{O}_2[/tex]
Now we deal with sig figs. From the original problem, we are given 3 significant figures. Round your answer to the exact same number of sig figs:
[tex]\displaystyle 44.2143 \ \text{g} \ \text{O} \approx \boxed{ 44.2 \ \text{g} \ \text{O}_2 }[/tex]
∴ our answer is letter choice D.
---
Topic: AP Chemistry
Unit: Stoichiometry
If a magnet is put inside one coil of wire, a voltage is produced. what will happen if the magnet is put inside two coils of wire? a. there will not be a change. b. the voltage will decrease by a factor of two. c. the voltage will increase by a factor of two. d. the two coils of wire will cancel out the magnetic field. e. the voltage will be zero.
When the magnet is put inside two coils of wire, the voltage will increase by a factor of two.
What is induced emfAn induced emf occurs when a magnet is placed in magnetic field and their is relative motion of a conductor placed in the magnetic field.
The strength of the induced emf increases with increase in the number of the turns of the conductor and its relative speed in the field.
emf = NdФ/dt
where;
N is number of the loopsdФ is change in magnetic fluxdt is change in time.The above formula is the basis of Faraday's law of electromagnetic induction.
Thus, when the magnet is put inside two coils of wire, the voltage will increase by a factor of two.
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Select the correct answer. what is the solution to the problem rounded to the correct number of significant figures? 8.01 × 4.1 = ? a. 32.8 b. 32.84 c. 32.841 d. 33
The solution to the problem rounded to the correct number of significant figures is 32.841. Details about multiplication can be found below.
How to multiply to correct significant figures?Multiplication is the process of computing the sum of a number with itself a specified number of times.
According to this question, a mathematical value of 8.01 is multiplied by 4.1.
8.01 × 4.1 = 32.841 (5 s.f)
Therefore, the solution to the problem rounded to the correct number of significant figures is 32.841.
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What is the best reason for using iron filings (shreds) instead of an iron nail in a chemical reaction?
a) to decrease the amount catalyst during the reaction
b) to increase the molecular structure during the reactions
c) to decrease the rate of reaction
d) to increase the surface area of the reaction
The best reason for using iron filings (shreds) instead of an iron nail in a chemical reaction is to increase the surface area of the reaction.
What is rate of chemical reaction?Rate chemical reaction is the speed at the which chemical compounds react which each other. Some factors can speed up the rate of chemical reaction and they include;
ConcentrationTemperatureSurface area, etc.A large surface area provides enough medium for chemical reaction to occur and hence speeds up the rate of chemical reaction.
Thus, the best reason for using iron filings (shreds) instead of an iron nail in a chemical reaction is to increase the surface area of the reaction.
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When a chemical reaction occurs, what happens
to the atoms of the two reactants
Which is not a conjugate acid-base pair?
Question 1 options:
H3O+ and H2O
H2O and OH-
NH3 and NH2--
NH4+ and NH3
HNO2 and H2O
Answer:
Explanation:
''A conjugate acid is formed when a proton is added to a base, and a conjugate base is formed when a proton is removed from an acid.''
In a conjugate acid-base pair, only difference between molecules is the amount of ''H''
One molecule must have 1 more H
in the last example HNO2 and H2O, difference is not only the H amount also H2O doesn't have N. So we can't say they are conjugate acid-base pair.
Compounds that contain carbon-hydrogen bonding are collectively termed.
Answer:
collectively they're known as HYDROCARBONS
Stacy made the following table to compare the functions of plant and animal structures, but she is missing a row title. Which of the following would best replace the X?
a table comparing the functions of different animal and plant structures. There is an unknown 'X' in the table. The skeleton in animals and the stem in plants provide support. The fur in animals and the waxy covering in plants provide protection. The ovaries in animals and the pistil in plants make 'X'
Answer:
female reproductive structures
Question progr
when the reactants have less enthalpy than the products, then
a. none of these
ob. the reaction will be complete
c. heat energy is given out
d. heat energy is absorbed
What type of reaction is illustrated?
C + 2F2 → CF4
Answer:
Synthesis Reaction
Explanation:
An synthesis reaction is one in which two or more atoms/molecules react to create a different molecule. These reactions follow the general structure: A + B --> AB.
More specifically, this is an addition reaction. An addition reaction occurs when two or more atoms/molecules combine to create a larger molecule. In this case, carbon and fluorine react to form carbon tetrafluoride, a larger molecule consisting of all the reactants.
This is not a decomposition reaction because these reactions involve a molecule breaking down into atoms or simpler molecules. These reactions follow the general structure: AB --> A + B.
This is not a single-replacement reaction because these reactions involve atoms replacing atoms of a different element in a compound. These reactions follow the general structure: A + BX --> B + AX.