Stoichiometry Review Video

When would you use molar mass? Select 2

• When converting from grams to moles

• When converting from moles to grams

• When converting from moles to molecules

• When converting between compounds

Where is a mole to mole ratio found?

• On the balanced chemical equation

• On the unbalanced chemical equation

• On the periodic table

• Given in the question

If you want to change compounds, what do you use?

• Mole to Mole ratio

• molar mass

• Avogadro's number

• 22.4L

Which of the following would require the use of Avogadro's number?

• converting moles to molecules

• converting moles to grams

• converting between compound

• converting moles to liters

Why do you need the balanced chemical equation?

• You are given grams one compound and are asked to find grams of another compound

• You need the balanced chemical equation to convert from grams to moles

• You need the balanced chemical equation to convert from grams to particles

• You need the balanced chemical equation to convert from moles to particles

The molar mass of water is 18.02g/mol. She did not show how to calculate it. Which of the following correctly shows how to calculate this value?

• H = 1.008 x 2 = 2.016

  O = 15.99

  2.016+15.99 = 18.02

• H = 9.01

  O = 9.01

  9.01+9.01 = 18.02

• H2 = 1.008

  O = 15.99

  1.008+15.99 = 18.02

• 15.99*2.016 = 18.02

What is Avogadro's number?

• 6.022x10²³

• 6.022

• none of my business

• 22.4L

You have to use the mole to mole ratio from the balanced chemical equation. What is the mole to mole ratio of Carbon dioxide: Carbon monoxide?

• 2:2

• 2:1

• 1:2

• 6.022

The first step involves the molar mass of CO. What is the molar mass of CO?

• C = 12.01

  O = 15.99

  12.01+15.99 = 28g/mol

• C = 12.01

  O = 15.99

  12.01x15.99 = 28g/mol

• C = 12.01 x2 = 24.02

  O = 15.99

  24.02+15.99 = 28g/mol