Copper is composed of two naturally occurring isotopes: cu−63 (69.170%) and cu−65. the ratio of the masses of the two isotopes is 1.0318. what is the mass of cu−63?

V1t2 = v2t1 is an expression of who’s law

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

Identify the lewis acid in this balanced equation: ag+ + 2nh3 -> ag(nh3)2+a. ag+b. nh3c. ag(nh3)2+