Which of the following solution has a pH<7? * I. NaF
II. Fe(NO3)3
III. CaSO3
A. I and Ill
B. Il only
C. Ill and Ill
D. I and Il

WILL GIVE BRAINLIEST!!

Compare and contrast the bohr model and the electron cloud models of the atom.

The bond energy for the van der waals bond between two helium atoms is 7.9×10−4ev. assuming that the average kinetic energy of a helium atom is (3/2)kbt, at what temperature is the average kinetic energy equal to the bond energy between two helium atoms

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?