Solved Mole Ratio Worksheet 1) Given this cquation: N2 + 3H2 ... - Free Printable

Let's go through each question step by step and solve them using mole ratios from balanced chemical equations.

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1) Given this equation: N₂ + 3 H₂ → 2 NH₃

We use the coefficients in front of each substance to determine molar ratios.

- N₂: 1 mole
- H₂: 3 moles
- NH₃: 2 moles

Now, write the molar ratios:

a) N₂ / H₂
From the equation: 1 mol N₂ : 3 mol H₂
So, ratio = 1/3

b) N₂ / NH₃
1 mol N₂ : 2 mol NH₃
So, ratio = 1/2

c) H₂ / NH₃
3 mol H₂ : 2 mol NH₃
So, ratio = 3/2

✔ Answers:
- a) 1:3
- b) 1:2
- c) 3:2

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2) Given: 8 H₂ + S₈ → 8 H₂S

Coefficients:
- H₂: 8
- S₈: 1
- H₂S: 8

a) H₂ / H₂S
8 mol H₂ : 8 mol H₂S → Simplify: 1:1

b) H₂ / S₈
8 mol H₂ : 1 mol S₈ → 8:1

c) H₂S / S₈
8 mol H₂S : 1 mol S₈ → 8:1

✔ Answers:
- a) 1:1
- b) 8:1
- c) 8:1

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3) Equation: 2 H₂ + O₂ → 2 H₂O

Coefficients:
- H₂: 2
- O₂: 1
- H₂O: 2

a) What is the H₂ / H₂O molar ratio?
2 mol H₂ : 2 mol H₂O → 1:1

b) If you have 20 moles of H₂ and plenty of O₂, how many moles of H₂O can be made?

Use the ratio:
H₂ : H₂O = 2:2 = 1:1
So, 20 moles H₂ → 20 moles H₂O

c) What is the O₂ / H₂O molar ratio?
1 mol O₂ : 2 mol H₂O → 1:2

d) If you have 20 moles of O₂ and enough H₂, how many moles of H₂O can be made?

From the ratio: 1 mol O₂ → 2 mol H₂O
So, 20 mol O₂ → 20 × 2 = 40 moles H₂O

✔ Answers:
- a) 1:1
- b) 20 moles H₂O
- c) 1:2
- d) 40 moles H₂O

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4) Use: N₂ + 3 H₂ → 2 NH₃

Coefficients:
- N₂: 1
- H₂: 3
- NH₃: 2

a) If you used 1 mole of N₂, how many moles of NH₃ could be produced?

From the equation: 1 mol N₂ → 2 mol NH₃
So, answer = 2 moles NH₃

b) If 10 moles of NH₃ were produced, how many moles of N₂ would be required?

Ratio: 2 mol NH₃ ← 1 mol N₂
So, for 10 mol NH₃:
(10 mol NH₃) × (1 mol N₂ / 2 mol NH₃) = 5 moles N₂

c) If 3.00 moles of H₂ were used, how many moles of NH₃ would be made?

Ratio: 3 mol H₂ → 2 mol NH₃
So, (3.00 mol H₂) × (2 mol NH₃ / 3 mol H₂) = 2.00 moles NH₃

d) If 0.600 moles of NH₃ were produced, how many moles of H₂ are required?

Ratio: 2 mol NH₃ ← 3 mol H₂
So, (0.600 mol NH₃) × (3 mol H₂ / 2 mol NH₃) =
= (0.600 × 3)/2 = 1.800 / 2 = 0.900 moles H₂

✔ Answers:
- a) 2 moles NH₃
- b) 5 moles N₂
- c) 2.00 moles NH₃
- d) 0.900 moles H₂

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✔ Final Summary of All Answers:

#### 1)
a) N₂/H₂ = 1:3
b) N₂/NH₃ = 1:2
c) H₂/NH₃ = 3:2

#### 2)
a) H₂/H₂S = 1:1
b) H₂/S₈ = 8:1
c) H₂S/S₈ = 8:1

#### 3)
a) H₂/H₂O = 1:1
b) 20 moles H₂ → 20 moles H₂O
c) O₂/H₂O = 1:2
d) 20 moles O₂ → 40 moles H₂O

#### 4)
a) 1 mol N₂ → 2 moles NH₃
b) 10 mol NH₃ → 5 moles N₂
c) 3.00 mol H₂ → 2.00 moles NH₃
d) 0.600 mol NH₃ → 0.900 moles H₂

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Let me know if you'd like these explained with dimensional analysis or stoichiometry steps!