Stoichiometry

Mole ratios are obtained from the

• balanced chemical equation
• periodic table
• molar mass
• textbook

How many Molar Ratios can be made from the following equation?

N₂ + 3H₂ → 2NH₃

• 3

• 2

• 6

• 4

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NGSS.HS-PS1-7

2 Cu₃FeS₃(s) + 7 O₂(g) --> 6 Cu(s) + 2 FeO(s) + 6 SO₂(g)

What is the mole ratio of iron (II) oxide (FeO) to sulfur dioxide (SO₂)?

• 2:7

• 2:6

• 6:2

• 7:2

Tags

NGSS.HS-PS1-7

• 4:5

• 1:1

• 6:4

• 4:6

How many moles of hydrogen gas (H₂) are needed to react completely with

2.0 moles of nitrogen gas (N₂)?

3 H₂(g) + N₂(g) --> 2NH₃(g)

• 3 mol H₂

• 6 mol H₂

• 2 mol H₂

• 4.5 mol H₂

Tags

NGSS.HS-PS1-7

How many moles of aluminum (Al) are required to react with 5 moles of oxygen (O₂)?

4Al + 3O₂ --> 2Al₂O₃

• 5.09 mol Al

• 7.52 mol Al

• 6.67 mol Al

• 15.62 mol Al

Tags

NGSS.HS-PS1-7

Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

How many moles of iron (Fe) can be made from 6 moles of H₂? 

• 4 moles Fe

• 6 moles Fe

• 9 moles Fe

• 2 moles Fe

Tags

NGSS.MS-PS1-5

How many grams are in 0.65 mol of water?

(Molar mass = 18g)

• 27.7g

• 0.036g

• 11.7g

• 13.5g

How many moles are in 124.1g of FeCl3?

(Molar mass = 162.3g)

• 0.76 mol

• 1.3 mol

• 0.002 mol

• 2.7 mol

CH₄ + 2O₂ --> 2H₂O + CO₂
What is the mass of CO₂ produced when 35g of O₂ reacts? 

• 1.09 g
• 24.1 g
• 28.2 g
• 44.0 g

Tags

NGSS.HS-PS1-7