Q.

The reaction of burning carbon in oxygen is represented by the equation

C(s)+O2(g)CO2(g)+Heat+Light

When 9.0 g of solid carbon is burnt in 16.0 g of oxygen gas, 22.0 g of carbon dioxide is produced. The mass of carbon dioxide gas formed on burning of 3.0 g of carbon in 32.0 g of oxygen would be

(Note : Atomic mass of C=12.0 u,O=16.0 u)

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a

6.60 g

b

7.33 g

c

11.00 g

d

8.25 g

answer is D.

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Detailed Solution

C    +    O    2   CO2

12g         32g           44g

3g      32g       ?

12g of C44g of CO2

3g of C?

x=44×312=11 g

The mass of  CO2  gas formed is 11g.

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