Stoichiometry Molecules and Liters

Molar masses are determined from

• the mole ratio of a given amount of reactant to an unknown amount of product
• the periodic table
• any mole ratio in the equation
• a conversion factor

Stoichiometry is based on the law of conservation of

• charge
• mass
• reactants
• volume

Tags

NGSS.HS-PS1-7

2H₂ (_____) + O₂ (_____)→ 2H₂O (_____)

How many moles of water can be produced if 8 moles H₂ are used?

• 4 moles

• 8 moles

• 16 moles

• 2 moles

Tags

NGSS.HS-PS1-7

N₂ (_____) + 3H₂ (_____)→ 2NH₃ (_____)

How many moles of hydrogen are needed to react with 5 moles of nitrogen?

• 6

• 2

• 3

• 15

Tags

NGSS.HS-PS1-7

2 KClO₃ (_____)→ 2 KCl (_____) + 3 O₂(_____)

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

• 6.7 mol

• 1.0 mol

• 10.1 mol

• 4.5 mol

Tags

NGSS.HS-PS1-7

SiO₂ (_____) + 3C (_____)→ SiC (_____) + 2CO (_____)

I need to add 8 moles of Carbon to the reaction. How many grams of Carbon should I weigh?

• 96 g

• 0.67 g

• 2.67 g

• 48 g

C₃H₈ (_____) + 5 O₂ (_____)→ 3 CO₂ (_____) + 4 H₂O (_____)

Suppose that an excess of propane, C₃H₈ burns in 320 g of O₂. How many moles of H₂O will be formed?

• 0-5

• 6-10

• 10-15

• >15

Tags

NGSS.HS-PS1-7

2 H₂ (_____) + O₂(_____) → 2 H₂O (_____)

How many grams of water can be prepared from 8 grams of hydrogen at standard conditions?

• 0-25

• 26-50

• 50-75

• >75

C₆H₁₂O₆ (_____) + 6 O₂(_____) → 6 CO₂ (_____) + 6 H₂O (_____)

A certain amount of glucose, C₆H₁₂O₆ burned in oxygen, and produced 22 grams of carbon dioxide, CO₂. How many grams of water was produced at the same time?

• 0-5

• 6-10

• 11-15

• >15

2 CO (_____) + O₂(_____)→ 2 CO₂ (_____)

In the formation of carbon dioxide from carbon monoxide and oxygen, how many moles of carbon monoxide are needed to react completely with 7.0 moles of oxygen gas?

• 0-5

• 6-10

• 11-15

• >15