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WorksheetsChemistry Review stoichiometry, gas laws, and organic chem
Total questions: 85
Worksheet time: 2hrs 27mins
I use 6.02 x 1023 when the problem gives me molecules?
True
False
I use mole ratio (coefficients) from balanced chemical equation?
True
False
2H2 + O2 → 2H2O
How many moles of water, H2O, can be produced if 8.00 moles of H2 are used? (Show your work and answer)
3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe
Identify the mole ratios for the following pairs:
(a) Mg : (b) Fe
(c) Fe2O3 : (d) Fe
1 Fe2O3 : (e) MgO
1 Cl2 + 2 KBr → 1 Br2 + 2 KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?
(a) + 35 = 74g x 2 = 148g 39 + 80 = (b) g x 2 = 238g
(c) / (d) x 148 = (e) g
1 CH4 + 2 O2 → 1 CO2 + 2 H2O
How many moles of carbon dioxide (CO2) are produced from the combustion of 110.0 g of CH4 (molar mass = 16 g)?
13.7 mol
2.75 mol
6.85 mol
6.11 mol
1 B2H5 + 3 O2 → 2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H5?
16 x 2 = (a) x 3 = 96 g (11 x 2) + (1 x 5) = 27 g
(b) / (c) x (d) = (e) g
1 Fe2O3 + 3H2 → 2 Fe + 3 H2O
How many moles of iron (Fe) can be made from 3.0 moles of Fe2O3?
(a) / (b) x (c) = (d) mol Fe
2 Al + 3 H2SO4 → 1 Al2(SO4)3 + 3 H2
How many grams of aluminum sulfate (Al2(SO4)3) would be formed if 250.0 g sulfuric acid (H2SO4) completely reacted with aluminum?
(27x2) + ( (a) x3) + (16x12) = 342 g (1x6) + (32x3) + (16x12) = 294 g
(b) ÷ (c) x (d) = (e) g
4 Al + 3 O2 → 2 Al2O3
How much mass of aluminum (Al) would be needed to completely react with 45.00 g of oxygen (O2)?
(a) x 4 = 108 g 16 x 6 = 96 g
(b) ÷ (c) x (d) = (e) g
How many moles of calcium carbonate (CaCO3) are required to prepare 45.5 g of
calcium oxide (CaO)?
1 CaCO3 → 1 CaO + 1 CO2
(a) + 16 = (b) g
(c) ÷ 56 x (d) = (e) mol
Balance the following reaction:
_Al2O3 → _Al + _O2
2
4
3
1 N2 + 3 H2 → 2NH3
How many moles of hydrogen, H2, are needed to react with 2.00 mol of nitrogen, N2?
(a) mol N2 ÷ (b) mol N2 x (c) mol H2 = (d) mol H2
2H2 + O2 → 2H2O
How many moles of water, H2O, can be produced if 8.00 moles of H2 are used? (Show your work and answer)
What is the correct molar mass for Mg(OH)2? (Round to the hundredths place)
(a)
How many of each type of atom are in Ca(OH)2?
(a) Ca
(b) O
2 (c)
(d) atoms total
How many of each type of atom are in Na2SO4?
(a) Na
(b) S
(c) O
(d) atoms total
What is the molar mass of carbon, rounded to the nearest whole number?
6 grams
10 grams
11 grams
12 grams
13 grams
What is the molar mass of oxygen, rounded to the nearest whole number?
8 grams
15 grams
16 grams
17 grams
Write the atomic mass of helium, rounded to the nearest whole number. Just type in the number, not the unit. Helium = _ g.
(a)
What is the molar mass of H2, rounded to the nearest whole number?
1 gram
2 grams
3 grams
4 grams
What is the molar mass of H2O, rounded to the nearest whole number?
3 grams
12 grams
17 grams
18 grams
What is the molar mass of Al2O3, rounded to the nearest whole number?
48 grams
54 grams
102 grams
43 grams
What is the molar mass of Na2SO4?
112 g
122 g
61 g
142 g
A student measures the pressure and volume of an empty water bottle to be 1.4 atm and 2.3 L. She then decreases the pressure to 0.65 atm. What is the new volume?
2.1 L
5.0 L
8.2 L
3.9 L
A student inflates a balloon with helium then places it in the freezer. The student should expect
the balloon's volume to increase
the balloon's volume to decrease
the balloon's moles to increase
the balloon's moles to decrease
What is the pressure of a car tire that had an initial pressure of 1.8 atm but was heated from 38°C to 123°C?
0.9 atm
2.1 atm
1.6 atm
3.4 atm
If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?
The pressure will increase
The pressure will decrease
The pressure will remain constant
The pressure will equalize
223.15
323.15
100.15
50.15
A sample of gas with a volume of 30.0 mL at 25.0oC is heated to 50.0oC. What is the new volume of the gas?
60.0 mL
15.0 mL
27.5 mL
32.5 mL
Match the following units to their names.
Pressure
mmHg
Volume
L
Temperature
K
Moles
mol
8 L
What does R stand for
Ideal gas constant
Real gas constant
Temperature constant
Ideal gas law
Pressure constant
Determine the temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under 0.998 atm pressure.
200 K
310 K
300K
Determine the Celsius temperature of 2.49 moles of gas contained in a 1.00-L vessel at a pressure of 143 kPa. Solve for T and then change you answer to Celcius
Kilojoules
We can use two R values: 0.0821 and 8.31.
How do you know which to use for an ideal gas problem?
The units for pressure
The units for temperature
The units of volume
The amount of moles
Your instructor will tell you for each question
In the following, what is the unknown variable:
What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20⁰C and 1.2 atm?
P
V
n
T
R
In the following, what will be the value for R:
What is the volume of a balloon if it contains 3.2 moles of helium at a temperature of 20⁰C and 1.2 atm?
0.0821 L⋅atm∕mol⋅K
8.31 L⋅kPa∕mol⋅K
0*C
273 K
101.3 kpa
When Temperature of a gas increases, the Volume will ____________________
Increase
Decrease
Stay the Same
When Volume of a gas increases, the Pressure will ______________
Increase
Decrease
Stay the Same
What does the unit atmosphere, atm, measure?
Pressure
Temperature
Volume
Moles
A Balloon is inflated by filling it with Helium.
Which variables are changing?
Volume and pressure change
Pressure and temperature change
Volume and temperature
Number of moles of gas and volume
Which of the following changes would cause a decrease in the Volume of a gas?
(Select all that apply)
Lowering the Temperature
Increasing the Pressure
Increasing the Temperature
Lowering the Pressure
Which container will have lower pressure? Why?
First container; Same number of moles of gas but a larger volume
Second container; Same number of moles of gas but a smaller volume
First container; Fewer moles of gas but a smaller volume
Second container; Fewer moles of gas but a larger volume
PV=nRT
In the ideal gas law, P = (a) , V = (b) , n = (c) ,
R = (d) , and T = (e)
Match the following units to their names.
grams
moles
Celsius
Kelvin
mL
L
dm^3
cm^3
mmHg
atm
torr
kPa
What does the variable "R" represent in the ideal gas law?
pressure
volume
moles
the gas constant
temperature
What is STP?
1 Degrees Celsius and 0 ATM
0 Degrees Celsius and 1 ATM
0 Kevin and 10 ATM
273 Celsius and 273 ATM
Name the Following
1,3-dibromo-3-methyl-2-nonene
1,5-dibromo-5-methyl-2-nonene
2,bromo-5-methyl-2-nonene
1,5-dibromo-5-methyl-2-nonane
Name the following:
2,2,4-dimethylhexane
2,2,4-triethylhexane
2,2,4-trimethylhexane
2,2,3-triethylhexane
Name the following:
2,3-dimethylpentene
2,3-diethylpentane
2,3,2-trimethylpentane
2,3-dimethylpentane
Name the following:
2-methylpentane
methylpentane
ethylpentane
2-ethylpentane
Name the following:
4-ethyl-4-methylhexane
3-ethyl-3-methylhexene
3-ethyl-3-methylhexane
3-methyl-3-ethylhexane
Name the following:
2-methylpropene
methylpropene
methylpropane
2-methylpropane
Name the compound
2-methyl-5,5-dibromo pentane
4,4-dimetyl-1,1-dibromo butane
5-methyl-1,2-dibromo hexane
4-methyl-1,1-dibromo pentane
Classify the compound based on the functional group present.
alkane
alkene
alkyne
Classify the compound based on the functional group present.
alkane
alkene
alkyne
aromatic
Classify the compound based on the functional group present.
alkane
alkene
alkyne
aromatic
How many carbon atoms are in propane
1
2
3
4
If an alkane has 20 carbon atoms, how many hydrogen atoms will it have?
20
22
40
42
Name this alkane
Methane
Ethane
Propane
Butane
Name this alkane
Methane
Ethane
Propane
Butane
The "ane" ending in "alkane" tells someone that they are dealing with _________-bonded carbons.
single
double
triple
quadruple
Give the name of this compound...
C3H8
Propene
Butane
Butene
Propane
David, Anika, and Harper are in a chemistry class. Their teacher showed them a compound with the formula C3H8 and asked them to name it. What is the correct name of this compound?
Propene
Butyne
Butene
Propane
Harper and Sophia are studying hydrocarbons in their chemistry class. They came across a particular hydrocarbon and are trying to determine its type. Is this hydrocarbon they found saturated or unsaturated?
saturated
unsaturated
Zoe is studying chemistry and she learned that organic compounds are compounds that contain ______________. Can you help her fill in the blank?
O
C
N
S
Grace, Priya, and James are working on a chemistry project to identify the molecular formula of Heptane. Which of the following is the correct formula for Heptane?
C4H10
C8H18
C5H12
C7H16
Charlotte and Harper are studying the structure of ethane. How many carbon atoms are present in an ethane molecule?
1
2
3
4
Which statement is correct?
All organic compounds contain carbon
All organic compounds contain hydrogen
a fuel derived directly from living matter.
petroleum fuels
Biofuels
Biodiesels
Fuel
Once the catalyst is mixed with the vegetable oil, the by-product that settles at the bottom is known as...
When cars were first invented, what did they run on?
Vegetable Oil
Lamp Oil
Diesel
Gasoline
Function of catalyst:
Increase the time taken of the process
Speed up the reaction
Increase the activation energy
Involve in the reaction
