# Chemical Process Calculation Questions and Answers – Mole and Molecular Weight – VII

This set of Chemical Process Calculation Questions and Answers focuses on “Mole and Molecular Weight-VII”.

1-10. A bucket contains 56 gms of C2H4, 36 gms of H2O and 44 gms of C3H8. (Molecular weights of the components are 28, 18 and 44 gms respectively)
1. How many moles of C2H4 are there in the bucket?
a) 1
b) 2
c) 4
d) 6

Explanation: Number of moles = mass / molecular weight.

2. How many moles of H2O are there in the bucket?
a) 1
b) 2
c) 4
d) 6

Explanation: Number of moles = mass / molecular weight.

3. How many moles of C3H8 are there in the bucket?
a) 1
b) 2
c) 4
d) 6

Explanation: Number of moles = mass / molecular weight.

4. What are the number moles of Oxgen present there in the bucket?
a) 1
b) 2
c) 4
d) 6

Explanation: Number of moles of Oxygen = 1/2(Number of moles of H2O) .

5. How many moles of H2 are there in the bucket?
a) 3
b) 6
c) 10
d) 12

Explanation: Moles of H2 = Moles of H2 in (2 Moles of C2H4+ 2 Moles of H2O + 1 Mole of C3H8).
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6. What is mole percentage of C2H4?
a) 0.2
b) 0.4
c) 0.6
d) 0.8

Explanation: Mole percentage = Moles of the component / Total moles.

7. What is mole percentage of H2O?
a) 0.2
b) 0.4
c) 0.6
d) 0.8

Explanation: Mole percentage = Moles of the component / Total moles.

8. What is mole percentage of C3H8?
a) 0.2
b) 0.4
c) 0.6
d) 0.8

Explanation: Mole percentage = Moles of the component / Total moles.

9. What is the weight percentage of C2H4?
a) 41.17
b) 51.17
c) 61.17
d) 71.17

Explanation: Weight percentage = Weight of the component / Total weight.

10. What is the weight percentage of H2O?
a) 26.47
b) 36.47
c) 47.47
d) 58.47

Explanation: Weight percentage = Weight of the component / Total weight.

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