Which equivalence factor set should you use to convert from 4.23 x 1012 atoms of calcium (ca) to grams of ca?

Modern weaponry has increased the number of deaths in wars and violent conflicts.

What is calcium oxide+diphosphorus pentoxide--> calcium phosphate balanced

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.