Problem: Calculate the mass percent composition of each constituent element of potassium chromate.

FREE Expert Solution

mass percent=mass elementtotal mass of compound×100


potassium chromate: K2CrO4

molar mass K = 39.1 g/mol

molar mass Cr = 52.0 g/mol

molar mass O = 16.00 g/mol


molar mass K2CrO4 = (39.1 g/mol x 2) + 52.0 g/mol + (16.00 g/mol x 4)

molar mass K2CrO4 = 194.2 g/mol



Mass percent of K:

total mass K = 39.1 g/mol x 2

total mass K = 78.2 g/mol

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Problem Details

Calculate the mass percent composition of each constituent element of potassium chromate.

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