What is the percent of Cr in
Cr203?
(Cr = 52.00 amu, O = 16.00 amu)
[?]%

68.42%

Step-by-step explanation:

We need to find the percent of Cr in .

Mass of Cr = 52 amu

Mass of O = 16 amu

Firstly, we will find the molar mass of as follows :

M = 2(52) + 3(16)

M = 152 amu

Percent of Cr in   will be :

Hence, the required percentage is 68.42%.

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