THIS NEEDS TO BE FILLED OUT

1.) Coefficient; 3

Subscript to Mg; None (1)

Subscript to Cl; 2

2.) Coefficient; none (1)

Subscript to V; 2

Subscript to O; 5

3.) Coefficient; 4

Subscript to K; 2

Subscript to C; None (1)

Subscript to O; 3

3.) Coefficient; None (1)

Subscript to Na; None (1)

Subscript to C; 2

Subscript to H; 3

Subscript to O; 2

Explanation:

The coefficient is the first big number and the subscript is the smaller number after the element.

astronomers such as edwin hubble.