Unit 6 Review: Stoichiometry

2H₂  +   O₂  →  2H₂O

How many moles of O₂ are consumed if 8 moles H₂ are used?

• 2

• 4

• 6

• 8

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe

What is the mole ratio of MgO to Fe?

• 3mol Mg / 2 mol Fe

• 2 mol Mg/ 3 mol Fe

• 1 mol Fe/ 2 mol Fe

• 3 mol MgO / 2 mol Fe

2 KClO₃ → 2 KCl + 3 O₂

How many moles of O₂ are produced when 6.7 moles of KClO₃ decompose completely?

• 6.7 mol

• 1.0 mol

• 10.1 mol

• 4.5 mol

2Na + 2H₂O → 2NaOH+ H₂

How many grams of H₂ are produced if 120 g of Na are available?

• 5.2 g

• 2.6 g

• 690 g

• 45 g

Cl₂ + 2 KBr → Br₂ + 2 KCl

How many grams of KCl can be produced from 356 g of KBr reacting with excess chlorine?

• 749 g

• 223 g

• 479 g

• 814 g

CH₄ + 2 O₂ → CO₂ + 2 H₂O

How many moles of CO₂ are produced from the combustion of 110 g of CH₄?

• 13.7 mol

• 2.75 mol

• 6.11 mol

• 6.85 mol

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)  

12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂

• 576 g of O₂

• 288 g O₂

What are the units for molar mass?

• grams

• amu

• g/mole

• liters

Which list of atom numbers in Mg(NO₃)₂ is right?

• Mg : 1--NO :  6

• Mg : 1-- N :  6--O:  6

• Mg :  1-- N:   1--  O: 5

• Mg :  1-- N: 2--  O: 6

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol

• 94.842 g/mol

• 38.822 g/mol

• 201.648 g/mol