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14/02/2022 4:58 pm
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A mixture of hydrogen and oxygen has volume 500 cm3, temperature 300 K, pressure 400 kPa and mass 0.76 g. The ratio of masses of oxygen to hydrogen will be :
(1) 3 : 8
(2) 3 : 16
(3) 16 : 3
(4) 8 : 3
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14/02/2022 5:08 pm
Answer: (3) 16 : 3
Explanation:
PV = nRT
400 x 103 x 500 x 10-6
= n\(\Big(\frac{25}{3}\Big)\)(300)n
= \(\frac{2}{25}\)
n = n1 + n2
\(\frac{2}{25}\) = \(\frac{M_1}{2}\) + \(\frac{M_2}{32}\)
Also M1 + M2 = 0.76 gm
\(\frac{M_2}{M_1}\) = \(\frac{16}{3}\)
This post was modified 3 years ago by admin