If a potassium atom has an atomic number of 19 and a mass number of 39, how many protons, electrons, and neutrons are in the atom?

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

Which describes fat? a: a carbohydrate that produces energy b: a nucleic acid that directs cell function c: a lipid that stores energy d: a protein that speeds up a chemical reaction

What is the molar mass of ca(cio4)2