What effect did the lower water levels have on the lake

The bubbles form when low water levels in Lake Mead, the reservoir behind the dam, create pressure differentials in the water flowing into the generators. As they move from areas of low pressure to high, the bubbles collapse and explode, scouring the turbine blades.

give me abc and i will get it for u.

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)