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Law of Mass Action

The weight of...

Question

The weight of $2.5$ moles of ethane $(C_{2} H_{6})$ is:
(Molecular Weight of $C = 12$ g/mole, $H = 1$ g/mole)

A

75

g

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B

25

g

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C

30

g

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D

60

g

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Solution

The correct option is A $75$ g
As we know,
Number of moles $= \frac{w}{M}$
So, the mass of $C_{2} H_{6} = 2.5 \times 30 = 75$ g

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