Samples of groundwater were collected and analyzed using absorption spectrophotometry. The samples contained 100 ppm of Calcium and 80 ppm of Magnesium to give the total hardness of calcium carbonate. Express the total hardness of CaCO3 in parts per million.

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

plz give brainliest

i wish i could but this one is weird give me abc and i can solve it.

they all get energy from eating other animals, dead animals to be more precise.

hienas tends to steal pray from other animals. crows and vultures tend to eat dead animals and leftovers.

hope it ,

bioteacher101