In any chemical reaction, the quantities that are conserved are ...

A. mass and moles.

B. the number of molecules and the volumes.

C. the number of moles and the volumes.

D. mass and number of atoms.

How do quasars differ from galaxies

What kind of charge does a cation have

1. An atom has 5 protons, 5 neutrons, and 8 electrons. What is its charge? a. - 3 c. + 3 b. - 8 d. + 5

Is phenoxyethanol an organic compound?

8.32 * 10^20 formula units CaBr2

Which is the balance equation for S8+O2=SO2

Sound waves travel fastest through? A.) Air B.) Steel C.) Water D.) Vacuum

Which of the following combinations will result in a reaction that is never spontaneous? 1) positive enthalpy change and positive entropy change 2) positive enthalpy change and negative entropy change 3) negative enthalpy change and positive entropy

Which of the formed elements is present in the greatest concentration?

A compound has a percent composition of 24.74% potassium (molar mass = 39.10 g/mol), 34.76% manganese (molar mass = 54.94 g/mol), and 40.50% oxygen (molar mass = 16.00 g/mol).