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Some Basic Concepts of Chemistry
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10/08/2021 11:26 am
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Silver oxide (Ag2O) decomposes at temperature 300°C yielding metallic silver and oxygen gas. A 1.60 g sample of impure silver oxide yields 0.104 g of oxygen gas. What is the percent by mass of the silver oxide in the sample?
(a) 5.9
(b) 47.125
(c) 94.25
(d) 88.2
1 Answer
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10/08/2021 11:30 am
Answer is : (c) 94.25
Explanation:
Let mass of Ag2O = x g
Ag2O → 2Ag + \frac{1}{2}O2
xg
232g \frac{1}{2} x 32 = 16g O2
\frac{16}{232}\times x = 0.104
x = 1.508g
% of Ag2O = \frac{1.508}{1.6}x 100
= 94.25%