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Question

When 3 g of carbon is burnt in 8 g of oxygen, 11g of carbon dioxide is produced. What mass of carbon dioxide will be formed when 3 g of carbon is burnt in 50 g oxygen?

A
12 g
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B
13 g
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C
11 g
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D
10 g
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Solution

The correct option is C 11 g
This is governed by the law of definite proportion. Carbon and oxygen combine in 3:8 ratio. So 11 g of carbon dioxide is formed.

Hence, in the latter case too, only 8 g of O2 will be reacted with 3g of carbon (because carbon is the limiting reagent here ) to form 11g of CO2 and 42 g of oxygen will remain unreacted.

Hence, the correct option is C.

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