Carbon dioxide

Calculate how many grams of oxygen are in 50 g of carbon dioxide CO2. Relative atomic mass of oxygen is 16 and of carbon is 12.

Correct result:

m =  36.4 g

Solution:

$m = 50 \cdot \dfrac{ 2 \cdot 16}{12+2 \cdot 16} = 36.4 \ \text{g}$

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