How many molecules of water are in 0.578 moles of water?

What’s the percent by mass of carbon in c10h14n2

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.

Which statement describes james chadwick’s discovery.