Silver exists in nature of two isotopes: Ag-107 and Ag-109. If the average atomic mass of silver is 107.9 u, which isotope is more abundant? Explain your answer.

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

What is the mass of 0.750 mole of aluminum oxide, al2o3?