Write the balanced chemical equation between solid magnesium carbonate and aqueous solution of sulfuric acid
well, you can start with
MgCO3 + H2SO4 → MgSO4 + CO2 + H2O
and then fill in the appropriate states
MgCO3 + H2SO4 → MgSO4 + CO2 + H2O
and then fill in the appropriate states