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OpenStudy (anonymous):
Which of the following is a correctly balanced equation? A. 2Cu + O2 --> 2CuO B. Mg + O2 --> MgO2 C. 3kCl + HNO3 --> 3HCl + KNO3 D. CaCO3 --> CaO + CO3
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OpenStudy (jfraser):
which reaction has the \(same \space number\) of the \(same \space kinds\) of atoms on both sides?
OpenStudy (anonymous):
D
OpenStudy (jfraser):
it's not D
OpenStudy (dtan5457):
Choice "d" has an extra oxygen, therefore it's not balanced.
OpenStudy (anonymous):
Its A
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