When 2.50 grams of copper reacts with oxygen?

Question

Chemistry

Gray

20 June, 14:47

When 2.50 grams of copper reacts with oxygen?

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Arthur Holland · Answer 1

Mass oxigen = 2.81 - 2.50 = 0.31 g

Moles O = 0.31 g / 15.9994 g/mol = 0.0194

moles Cu = 2.50 g / 63.546 g/mol = 0.0393

we divide by the smallest number

0.0194 / 0.0194 = 1 = > O

0.0393 / 0.0194 = 2 = > Cu

the formula is Cu2O (Copper (I) oxide)

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