Justinoreilly71
19.10.2019 •
Chemistry
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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Ответ:
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%
Ответ:
536 meters
536,00 centimeters