The percent by mass of copper in cubr2 is

The mass percent of copper in is 28.45 %.

Explanation:

In , there are 1 copper atom and 2 bromine atoms.

To calculate the mass percent of element in a given compound, we use the formula:

Mass of copper= 63.54 g

Mass of copper bromide = 223.37 g

Putting values in above equation, we get:

Hence, the mass percent of copper in copper bromide is 28.45 %.

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