Question

I need help fast. i will give you 85 points

Answer 1

It’s the third one!
4Sb + 3O2 -> Sb4O6
There’s four antimony’s (Sb) on both sides and six oxygen’s on both sides.

Answer 2

H3AsO4 → As2O5 + H2O

Step-by-step explanation:

The first equation is balanced:

H3AsO4 → As2O5 + H2O

Here's a breakdown of the balanced equation:

Reactants:

H3AsO4: 3 hydrogen atoms, 1 arsenic atom, and 4 oxygen atoms

Products:

As2O5: 2 arsenic atoms and 5 oxygen atoms

H2O: 2 hydrogen atoms and 1 oxygen atom

As you can see, the number of atoms of each element is the same on both sides of the equation. This means that the equation is balanced.