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WorksheetsStoichiometry Multiple Choice Quiz
Total questions: 29
Worksheet time: 34mins
How many moles are in 36 grams of H₂O?
1 mole
2 moles
3 moles
0.5 moles
Which unit is used to measure the amount of substance in stoichiometry?
Grams
Mole
Liter
Kelvin
What is the molar mass of H₂O?
16 g/mol
18 g/mol
20 g/mol
22 g/mol
What is Avogadro's number?
6.02 × 10²⁰
6.02 × 10²³
3.14 × 10²³
1.00 × 10²²
What is the volume of 1 mole of gas at STP?
22.4 L
11.2 L
What is the correct mole ratio for the reaction 2H₂ + O₂ → 2H₂O?
2:2
2:1
1:2
3:1
A reaction has a theoretical yield of 120 g, but the actual yield is 90 g. What is the percent yield?
75%
90%
125%
50%
How many molecules are in 2 moles of CO2?
6.02 × 10^23
1.20 × 10^24
3.01 × 10^23
2.00 × 10^22
What is Avogadro's number?
6.02 × 10^20
6.02 × 10^23
3.14 × 10^23
1.00 × 10^22
How many moles of oxygen are needed to completely react with 4 moles of CH4 in CH4 + 2O2 → CO2 + 2H2O?
2 moles
4 moles
6 moles
8 moles
How many liters of CO2 are produced when 2 moles of C3H8 are burned in excess oxygen?
22.4 L
44.8 L
67.2 L
How many grams of NaCl can be formed from 3 moles of Na in the reaction 2Na + Cl2 → 2NaCl?
117 g
58.5 g
234 g
97.5 g
In the image, which reactant is limiting?
The white molecules, because there are extra.
The black atoms, because they are completely used up.
The white molecules, because they are completely used up.
The black atoms, because there are extra.
What is the number of moles in 22 grams of carbon dioxide ( CO2 )? (Molar mass of CO2 = 44 g/mol)
0.5 moles
1 mole
2 moles
0.25 moles
If 5 moles of hydrogen gas react with nitrogen gas to produce ammonia, how many moles of ammonia are produced?
3 H 2 + N 2 --> 2 NH 3
2.5 moles
5 moles
3.3 moles
4.41 moles
What is the percent yield of a reaction if the theoretical yield is 50 grams and the actual yield is 45 grams?
90%
80%
95%
85%
How many grams of CO 2 are produced when 44 g of CH 4 are completely combusted in excess oxygen? (Molar mass: CH 4 = 16 g/mol, CO 2 = 44 g/mol)
CH 4 + 2 O 2 --> CO 2 + 2 H 2 O
44 g
88 g
132 g
121 g
If 10 grams of calcium carbonate (CaCO 3 ) decomposes into calcium oxide (CaO) and carbon dioxide (CO 2 ), how many grams of carbon dioxide are produced? (Molar mass of CaCO 3 = 100 g/mol, CaO = 56 g/mol, CO 2 = 44 g/mol)
4 grams
5 grams
44 grams
10 grams
What is the number of moles in 22 grams of carbon dioxide ( CO2 )?
0.50 moles
1.1 mole
2.5 moles
0.25 moles
0.75 moles
What is the Standard for Temperature and Pressure?
273 K and 1 atm
273 C and 1 kPa
273 F and 1 mmHg
273 K and 1 Torr
What is the volume of 1 mole of gas at Standard Temperature and Pressure (STP)?
22.4 L
2.4 L
.24 L
.024 L
A sample of 3.0 moles of nitrogen (N2) gas at STP occupies a volume of ____ liters.
22.4 L
44.8 L
67.2 L
11.2 L
In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?
4 grams
6 grams
8 grams
10 grams
In the equation, 46 grams of sodium (Na) reacted with 36 grams of water (H2O). If 2 grams of hydrogen gas (H2) are produced by this reaction, what is the mass of sodium hydroxide (NaOH) produced?
10 grams
44 grams
80 grams
82 grams
If the actual yield of a reaction is 30 grams and the percent yield is 75%, what is the theoretical yield?
22.5 grams
40 grams
45 grams
60 grams
If 23 g KCl are obtained,
what is the percent yield for the reaction?
44%
102%
98%
43%
What will the percent yield of a reaction be if the theoretical yield is 40.5 g Cu and experimentally a yield of 38.7 g Cu was measured?
82%
105%
87%
95.6%
