Question

Be+H2So4( концентрована) Cr+H2So4( концентрована) Sn+H2So4( концентрована)

Answer 1

Sn + 2H2SO4(конц. ) => SnSO4 + SO2↑ + 2H2O

2Cr + 6H2SO4(конц. ) = Cr2(SO4)3 + 3SO2↑ + 6H2O

Be + 2H2SO4 = BeSO4 + SO2 + 2H2O

Answer 2

It seems like you've provided a list of chemical equations, but they are incomplete. To fully understand the reactions and provide you with the balanced chemical equations, we need to know the products formed in each case. When reactions occur between substances, new compounds are usually formed.

Please provide the missing information, such as the products or any additional conditions given for these reactions. For example, are these reactions happening under specific conditions (e.g., temperature, pressure) or with specific concentrations of the reactants? With that information, I'd be happy to help you balance the equations and provide more details about the reactions.