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A gaseous hydrocarbon X, was burnt in ex...

A gaseous hydrocarbon `X`, was burnt in excess of oygen. A `0.112 dm^(2)` sample of `X`, at `STP` gave `0.88 g` of `CO_(2)`. How many C-atoms are there in one molecule of `X`?
a. 1 b. 2 c. 3 d. 4

Text Solution

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d. `C_(x) H_(y) (g) + (x + (y)/(4)) O_(2) (g) rarr xCO_(2) (g) + (y)/(2) H_(2) O(l)`
M moles
`= (0.112)/(22.4) xx 10^(3) = 5`
`= 5 x` some left `O_(2)` `5x` -
`:. 5 x = (0.88 xx 1000)/(44) = 20`
`:. x = 4`
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