Question

1)Fe + Н3РО4 → 5)Са + НС1 → 2)Cu + HNО3 → 4)Hg + H2SО4 → срочно хелп

Answer 1

1) 3Fe+2H3PO4= F3(PO4)2+3H2
2)Cu+4HNO3=Cu(NO3)2+ 2NO2+2H2O
3)Ca+2HCl=CaCl2+H2
4)Hg+2H2SO4=HgSO4+SO2+2H2O

Answer 2

It seems like you've provided a series of chemical reactions. I can help you balance them. Here are the balanced reactions for each equation you provided:

1. Fe + H3PO4 → Fe3(PO4)2 + H2

2. Cu + HNO3 → Cu(NO3)2 + NO + H2O

3. Ca + HCl → CaCl2 + H2

4. Hg + H2SO4 → HgSO4 + H2O + SO2

Please note that the numbers in parentheses indicate the coefficients in the balanced chemical equations. If you need further assistance or have any specific questions about these reactions, feel free to ask.