Stoichometry Practice

The rusting of iron is represented by the equation

4Fe + 3O₂ ⟶ 2 Fe₂O₃

If you have a 1.45 mol sample of iron, how many moles of Fe₂O₃ will form after the iron has rusted completely?

• 0.483 mol

• 0.725 mol

• 0.97 mol

• 1.45 mol

Tags

NGSS.HS-PS1-7

For the reaction

C₂H₄ + 3 O₂ ⟶ 2 CO₂ + H₂O

If 5.5 mol of CO₂ are produced, how many moles of O₂ reacted?

• 3.6 mol

• 6.8 mol

• 8.2 mol

• 13.7 mol

Tags

NGSS.HS-PS1-7

For the following equation

4NH₃ + 7 O₂ ⟶ 4 NO₂ + 6 H₂O

How many moles of ammonia are required to produce 11.9 moles of water?

• 4.76 mol

• 11.9 mol

• 7.93 mol

• 5.95 mol

Tags

NGSS.HS-PS1-7

For the following equation

4NH₃ + 7 O₂ ⟶ 4 NO₂ + 6 H₂O

How many molecules of NO₂ are produced when 5.38 moles of ammonia react completely?

• 21.52

• 6.48 x 10²⁴

• 3.24 x 10²⁴

• 247

For the reaction

3Cl₂ + 6NaOH ⟶ 5NaCl + NaClO₃ + 3H₂O

How many moles of chlorine molecules are needed to react with 13.3 g of NaOH?

• 1.00 mol Cl₂

• 0.333 mol Cl₂

• 0.67 mol Cl₂

• 0.166 mol Cl₂

For the reaction

2Cl₂ + 4NaOH ⟶ 3NaCl + NaClO₂ + 2H₂O

How many moles of Cl₂ are needed to react with 11.6 g of NaOH?

• 0.58 mol Cl₂

• 0.290 mol Cl₂

• 0.193 mol Cl₂

• 0.073 mol Cl₂

• 0.145 mol Cl₂

Tags

NGSS.HS-PS1-7

What mass of carbon dioxide will be produced when 29.9 g of butane reacts with an excess of oxygen in the following reaction?

2 C₄H₁₀ + 13 O₂ ⟶ 8 CO₂ + 10 H₂O

• 181.1 g CO₂

• 90.6 g CO₂

• 11.32 g CO₂

• 119.6 g CO₂

Consider the reaction

Mg₂Si + 4 H₂O ⟶ 2 Mg(OH)₂ + SiH₄

Calculate the number of grams of silane, SiH₄, formed when 35.9 g of Mg₂Si reacts with excess water.

• 30.1 g

• 10.1 g

• 15.0 g

• 19.5 g