Question

Balancing chemical equations​

Answer 1

1)
`La_2O_3+3H_2O\rightarrow 2La(OH)_3`

2)
`N_2O_5+H_2O\rightarrow 2HNO_3`

Step-by-step explanation:

Law of conservation of mass states that mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

While balancing a chemical reaction first balance the atoms of other elements and then in the end balance oxygen atoms.

1)
`La_2O_3+H_2O\rightarrow La(OH)_3`

Write 2 in front of
`La(OH)_3` to balance La and write 3 in front of
`H_2O` to balance hydrogen and oxygen

The balanced equation will be:

`La_2O_3+3H_2O\rightarrow 2La(OH)_3`

2)
`N_2O_5+H_2O\rightarrow HNO_3`

Write 2 in front of
`HNO_3` to balance nitrogen, hydrogen and oxygen.

The balanced equation will be:

`N_2O_5+H_2O\rightarrow 2HNO_3`