Question

Balance and identity the type of chemical reactions.
Mg(s) + HNO3(aq) -> H2(g) + Mg(NO3)2(aq)

Answer 1

so the balanced equation is 
Mg(s) + 2HNO3(aq) -> H2(g) + Mg(NO3)2(aq)
the type of chemical reaction is a single displacement reaction.