youngredhead youngredhead

12-06-2017
Chemistry

contestada

The percent by mass of copper in CuBr2 is Use mc004-1.jpg. 28.45%. 44.30%. 63.55%. 71.55%.

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scme1702 scme1702

19-06-2017

First, we must find the total mass of CuBr₂:
Mass = 64 + 2 x 80
Mass = 224

Percentage mass of copper = mass of copper x 100 / total mass
Percentage mass of copper = (64 / 224) x 100
Percentage mass of copper = 28.45%

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mnicolehernand mnicolehernand

15-09-2018

i believe it is A on e2020

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