How many atoms of each type does K2 CO3 contain ? A. K= 1, C = 2 , O = 3
B. K= 2 , C= 2 , O = 3
C. K =3 , C= 3 , O = 3
D. K= 2 , C =1 , O= 3

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

Why is retrograde motion an apparent motion

The equation below shows a chemical reaction. a + b + heat —> c + d according to the law of conservation of energy, which statement is true? a. the reactants absorb heat because they have less energy than the products. b. the products release heat because they have more energy than the reactants. c. the reactants generate heat because they have more energy than the products. d. the products require heat to form because they have less energy than the reactants.