How many atoms of oxygen are in seven molecules of lead (II) nitrate? A) 7
B) 6
C) 42
D) 3

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Which is the solubility product expression for caf2(s)?  [ca2+]/[f–]2  [ca2+][f2–]  [ca]+[f]2  [ca2+][f–]2