Problem: Calculate the mass percent composition of each constituent element of cobalt(II) bromide.

FREE Expert Solution

mass percent=mass elementtotal mass of compound×100


cobalt(II) bromide: CoBr2

molar mass Co = 58.933 g/mol

molar mass Br = 79.904 g/mol


molar mass CoBr2 = (58.933 g/mol x 1) + (79.904 g/mol x 2)

molar mass CoBr2 = 218.741 g/mol


Mass percent of Co:

total mass Co = 58.933 g/mol x 1

total mass Co = 58.933 g/mol


%Co=mass Comass CoBr2×100%Co=58.933 gmol218.741 gmol×100

 %Co = 26.94%

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Problem Details

Calculate the mass percent composition of each constituent element of cobalt(II) bromide.

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