please solve these questions fast.
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BELOW
Explanation:
1. NaOH+ HCl = NaCl+ H2O
2 Mg+ HCl= MgCl2 + H2
3. CuSO4+H2SO4=CuO3 + 2 SO2 + H2O.
4. 2HNO3+Na2CO3=2NaNO3+CO2+H2O.
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