Boron has two naturally-ocurring isotopes. boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an abundance of 80.2% and actual mass of 11.009 amu. what is the average atomic mass for all isotopes of boron?

10.812  to the nearest thousandth,.

Explanation:

That would be 0.198 * 10.013 + 0.802 * 11.009

= 10.812.

if you mean hydrogen and oxygen then water is the product

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.