Stoichiometry Review

The calculation of quantities in chemical equations is called ____.

• stoichiometry

• dimensional analysis

• percent composition

• percent yield

Tags

NGSS.HS-PS1-7

True or False. You must convert grams to moles to do stoichiometry.

• True
• False

Tags

NGSS.HS-PS1-7

Calculate the molar mass of NH₄NO₂

• 50 g/mol

• 60 g/mol

• 64 g/mol

• 78 g/mol

If you have moles on top, what do you need on the bottom of the conversion factor to be?

• atoms

• particles

• grams

• moles

Tags

NGSS.HS-PS1-7

If you have particles on top, what do you need on the bottom of the conversion factor to be?

• atoms

• particles

• grams

• moles

Tags

NGSS.HS-PS1-7

How many particles are in 13.5 grams of Beryllium?

• 1.5 particles
• 9 particles
• 4x10²³ particles
• 9x10²³ particles

5C + 2SO₂ --> CS₂ + 4CO

100.0 g of C reacts with SO₂. How many moles of CO are produced?

What is the first conversion factor that will be needed to solve this problem?

Tags

NGSS.HS-PS1-7

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass

Tags

NGSS.HS-PS1-7

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe
• 2 mol Mg/ 3 mol Fe
• 1 mol Fe/ 2 mol Fe
• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7