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WorksheetsStoichemistry Part 1
Total questions: 15
Worksheet time: 8mins
How many particles are in a mole?
a. 602
b. 602 million
3
c. 602 moles
d. 6.02 x 1023
What is the mole ratio in the following reaction: 2CO + O2 → 2CO2
a. 2:1:2
b. 1:1:1
c. 1:2:1
d. 2:1:1
KNO3 --> KNO2 + O2 What coefficients are needed to balance the reaction?
a. 2, 2, 1
b. 2, 3, 2
c. 1, 2, 2
d. 1, 3, 1
O2 + CS2 --> CO2 + SO2 What coefficient would go in front of the O2?
a. 1
b. 3
c. 2
d. 4
WO3 + H2 --> W + H2O What coefficient goes in front of H2?
a. 1
b. 2
c. 3
d. 4
2 KClO3 → 2 KCl + 3 O2 How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a. 6.7 mol
b. 1.0 mol
10.1 mol
4.5 mol
. 2Na + 2H2O → 2NaOH+ H2 How many grams of hydrogen are produced if 120 g of Na are available?
a. 5.2 g
b. 2.6 g
c. 690 g
d. 45 g
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2 How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
a. 0.85 g
b. 290 g
c. 450 g
d. 870 g
1 mole of any gas at STP has a volume of ______________________.
a. 22.4 liters
b. 44.2 liters
c. 6.02 x 1023 liters
d. 2.4 liters
Using the following equation: Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l) How many moles of iron (Fe) can be made from 6 moles H2?
4 moles Fe
6 moles Fe
9 moles Fe
2 moles Fe
2H2 + O2 → 2H2O How many moles of water can be produced if 8 moles H2 are used?
a. 4 moles
b. 8 moles
c. 16 moles
d. 2 moles
Balance this reaction: ____ RbNO3 + ____ BeF2 ----> ____ Be(NO3)2 + ____ RbF
a. 1,1,1,1
b. 1,2,1,1
c. d. 2,1,1,2
2,1,2,1
1Mg + 2H2O --> Mg(OH)2 + H2
What volume of hydrogen will be produced at STP by the reaction 67.3 g of magnesium?
. a. 62.0 L
b. 0.12 L
c. 2.77 L
d. 1.15 L
2Al + 6HCl --> 2AlCl3 + 3H2
Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?
a. 13
b. 8.8
c. 0.99
d. 1.0
How many moles are in 19.82 g Mg?
a. 1.226mol Mg
b. 481.7mol Mg
c. 0.82 mol Mg
d. 1.000mol Mg
