A sample of gold has a volume of 2 cm3 and a mass of 38.6 grams. what is the density of this sample

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.

An atom that gains or loses one or more electrons is called a(n)