Question

Choose the correct missing coefficient to balance the following equation:

___H2 + O2 ---> 2H2O *

1
2
3
4

Answer 1

2

Step-by-step explanation:

We want to balance the equation. On the right, there are 4 hydrogens, and 2 oxygens. We should have the same amount on the left.

For hydrogens, we want 4. 2 *2 =4,

Therefore, the answer is 2

I hope this helps! :)

Answer 2

2

Step-by-step explanation:

because it helps to balance the equation