Calculate the mass fraction of oxygen (%) in the following oxide: a) CaO b) Na2O c) P2O5 d) Fe2O3

univerkov | April 2, 2021 | education

a) w (O) = 16 \ 56 * 100% = 28.6%
b) w (O) = 16 \ 62 * 100% = 25.8%
c) w (O) = 16 \ 42 * 100% = 56.3%
d) w (O) = 3 * 16 \ 160 * 100% = 30%

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