# Stoichiometry Basics : Question Preview (ID: 8778)

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**To produce 12 moles of water, how many moles of oxygen gas are needed? 2C2H6 + 7O2 yields 4CO2 + 6H2O**

a) 2 moles

b) 14 moles

c) 9 moles

d) 7 moles

**How many liters of oxygen are required to produce 2 liters of water at STP? 2H2 + O2 yields 2H2O**

a) 1 L

b) 4 L

c) 3 L

d) 2 L

**If 5.9 moles of carbon react, how many moles of CS2 are produced? 5C + 2SO2 yields CS2 + 4CO**

a) 0.077 moles

b) 30 moles

c) 1.5 moles

d) 1.2 moles

**In the following reaction, how many moles of carbon monoxide are needed to react completely with 7.0 moles of oxygen gas? 2CO + O2 yields 2CO2**

a) 7.0 moles

b) 4.0 moles

c) 14 moles

d) 3.5 moles

**How many moles of carbon dioxide, can be formed by the decomposition of 5 moles of aluminum carbonate? Al2(CO3)3 yields Al2O3 + 3CO2**

a) 20 moles

b) 10 moles

c) 5 moles

d) 2 moles

**How many grams of H2SO4 are needed to produce exactly 11.2 liters of H2, measured at STP? Mg + H2SO4 yields MgSO4 + H2**

a) 24.5g

b) 196g

c) 49.0g

d) 98.0g

**How many liters of ammonia are produced when 28.0 grams of nitrogen are completely consumed? N2 + 3H2 yields 2NH3**

a) 5.60L

b) 44.8L

c) 22.4L

d) 11.2L

**If 3.50 g of H2S are used, how many grams of water are produced? 2H2S + 3O2 yields 2H2O + 2SO2**

a) 0.102g

b) 185g

c) 1.85g

d) 0.185g

**If 0.600g of Zn is used, how many grams of ZnCl2 is produced? Zn + 2HCl yields ZnCl2 + H2**

a) 0.125g

b) 0.18g

c) 12.5g

d) 1.25g

**How many molecules of sulfuric acid are produced from 284.1g of sodium sulfate? 2HCl + Na2SO4 yields 2NaCl + H2SO4**

a) 6.020 x 10 23 molecules

b) 6.020 x 10 24 molecules

c) 2.408 x 10 24 molecules

d) 1.204 x 10 24 molecules

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