Which of the following is true about catalysts?

A. Catalysts increase the number of collisions that occur between reactants.

B. Catalysts increase the activation energy by forming new reactants.

C. Catalysts reduce the potential energy of the compounds that are produced.

D. Catalysts reduce the energy needed for the reaction to take place.

Covalent network solids typically have melting points and boiling points. the chemical formula of a network solid indicates in the molecule.

How does concentration affect reaction rate

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.