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WorksheetsStoichiometry Quizizz #2
Total questions: 12
Worksheet time: 49mins
Which answer choice correctly balances this equation?
Al (s) + O2 (g) → Al2O3 (s)
It is already balanced.
2 Al (s) + 3O2 (g) → 2Al2O3 (s)
4 Al (s) + 6O2 (g) → 4Al2O3 (s)
4 Al (s) + 3O2 (g) → 2Al2O3 (s)
Use this equation: 2H2O2 (aq) →2H2O (l) + O2 (g)
What is the mole ratio of hydrogen peroxide to water?
2:1
2:2 or 1:1
1:2
You cannot tell the mole ratio from this equation.
Use this equation: 2H2O2 (aq) →2H2O (l) + O2 (g)
If 3 moles of water are produced, how many moles of Oxygen gas are produced?
6 mol O2
1.5 mol O2
3 mol O2
24 mol O2
Use this equation: 2H2O2 (aq) →2H2O (l) + O2 (g)
If 120 grams of Hydrogen peroxide decompose, how many moles of water are produced?
3.53 mol H2O
7.05 mol H2O
1.76 mol H2O
4,082.40 mol H2O
Use this equation: 2H2O2 (aq) →2H2O (l) + O2 (g)
If 300 grams of Oxygen gas is produced, how many grams of Hydrogen peroxide decomposed?
318 g H2O2
1,275.8 g H2O2
637.9 g H2O2
159.4 g H2O2
Use this equation: 2H2O2 (aq) →2H2O (l) + O2 (g)
If this decomposition produces 450 grams of water, how many grams of Hydrogen peroxide decomposed?
849.56 g H2O2
275,868.18 g H2O2
424.78 g H2O2
24.97 g H2O2
Use this equation: 2Cu (s) + O2 (g) → 2CuO (s)
How many grams of Copper (II) oxide is produced by 80 grams of Copper?
63.91 g CuO
404,432.2 g CuO
100.14 g CuO
50.07 g CuO
Use this equation: 2Cu (s) + O2 (g) → 2CuO (s)
How many grams of Copper (II) oxide are produced by 80 grams of Oxygen gas?
397.75 g CuO
795.5 g CuO
198.88 g CuO
99.44 g CuO
Use this equation: 2H2 (g) + O2 (g) → 2H2O (l)
If 50 grams of Hydrogen gas and 50 grams of Oxygen gas are used to produce water, which reactant is the limiting reactant?
H2 (g)
O2 (g)
H2O (l)
Neither is limiting.
The theoretical yield of water for a chemical reaction is 500 grams. If a student performs the experiment and collects 473.2 grams of water, what is the percent yield of water?
105.7 %
94.6 %
1.057 %
.946 %
A compound is 47.5 % Sulfur and 52.5 % Chlorine. What is the empirical formula for the compound?
SCl
S2Cl2
S3Cl3
S4Cl4
A compound has a molecular mass of 84.18 grams and the empirical formula is CH2. What is the molecular formula for this compound?
CH2
C3H6
C4H8
C6H12
