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Derrick Conley
Chemistry
2 December, 23:32
When 2.50 grams of copper reacts with oxygen?
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Hamlet
2 December, 23:37
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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)
Ya got this
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