JAMB - Chemistry (1979 - No. 13)
How many grams of HBr would exactly be required to react with 2 g of propyne? (C =12, H=1, Br = 80)
4. 1 g
6. 1 g
8. 1g
16.2g
Explanation
2HBr + C3H4 \(\to\) C3H6 + 2Br
162gms of HBr reacts with 40gms of propyne 2gms of propyne will react with
\(\frac{162}{40} \times \frac{2}{1}\) = 8.1gms HBr
162gms of HBr reacts with 40gms of propyne 2gms of propyne will react with
\(\frac{162}{40} \times \frac{2}{1}\) = 8.1gms HBr
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