Calculate the mass fraction of oxygen in carbon monoxide (CO2).
| June 1, 2021 | education
Formula for calculating the mass fraction of an element in a substance:
w = n * Ar (chemical element) / Mr (substance), where n is the number of atoms of a given chemical element.
1) Find the relative molecular weight of the substance (CO):
Mr (CO) = Ar (C) + Ar (O) = 12 + 16 = 28
2) Find the mass fraction of a given element in the substance:
w (O) = 16/28 = 0.57 or 57%
Answer: Mass fraction of oxygen in carbon monoxide is 57%.
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