Determine the mass fraction of oxygen in the compound of the composition CaO
| June 20, 2021 | education
Given: Copper oxide bivalent CаO.
ω% (О) =?
Decision:
In order to find the mass fraction of oxygen, you first need to find the relative molecular weight of calcium oxide.
Mr (CаO) = 20 + 16 = 36
We find the mass fraction of a substance by the formula:
ω = m1 / m х 100%
ω% (O) = 16/36 * 100% = 29%
answer: the mass fraction of oxygen in bivalent calcium oxide is equal to 29%.
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