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Which equation is obeying the Law of Conservation of Mass?
A. Cu + H2SO4 → CuSO4 + H20+ SO2
B. 4Cu + S8 + 8Cu2S
C. 2Fe + 302 → Fe203
D. 2Na + 2H20 → 2NaOH + H2

Sagot :

ADVENTUROUSBOYidn

2Na + 2H2O → 2NaOH + H2

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Explanation:

because same number of molecules are on both sides of reaction

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