In paragraphs: Define and differentiate energy, heat, and temperature.
Explain radiant energy, thermal energy, chemical energy, nuclear energy, and potential energy
Explain and exemplify the first law of thermodynamics

Explain system and surroundings
Exemplify open, closed, and isolated systems and relate them to the transfer of energy from and to the surroundings.

Explain and exemplify chemical reactions.
Differentiate through examples exothermic and endothermic reactions.

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

Consider this initial-rate data at a certain temperature for the reaction described by

The two naturally occurring isotopes of chlorine are 35cl (34.969 amu, 75.77%) and 37cl (36.966 amu, 24.23%). the two naturally occurring isotopes of bromine are 79br (78.918 rm amu, 50.69%) and 81br (80.916 amu, 49.31%). chlorine and bromine combine to form bromine monochloride, brcl. 1. how many peaks will be present in a mass spectrum for brcl? the four combinations of molecule possible given these four isotopes are: 81br37cl, 81br35cl, 79br37cl, and 79br35cl. 2. what are the masses of the four different brcl molecules? express the masses using six significant figures, in decreasing numeric order (highest to lowest), separated by commas.