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grin007 [14]
3 years ago
15

Calculate the percent composition (out of 100) by weight of potassium in potassium carbonate decahydrate.

Chemistry
1 answer:
Darya [45]3 years ago
7 0

Answer:

12.26%

Explanation:

MM K = 39.1 g/mol

MM K2CO3 . 10H2O = 2x39.1 + 12.01 + 3 x 15.99 + 10 x 18.02= 318.38 g/mol

% by weight = (MM K/MM K2CO3.10H2O ) x 100= (39.1/318.8)  x 100=12.26 %

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