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Explanation:
a)2Zn+H2SO4 - zn2so4+H2
g)Ca+2H2O - Ca(oH)2+H2
c)Pb,+2Hcl - Pbcl + H2O +cl
b)(NH4)2SO4+ Ca(OH)2 - CaSO4+2NH3+2H2O
d)Al2O3+3H2SO4 - Al2(SO4)3+3H2O
e)Fe+2H2SO4 - FeSO4+ SO2+2H2O
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the relative atomic mass of atom of an element is defined as the average marks of the atom
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