If an ion of phosphorus is represented by P-2, how many electrons does it have if phosphorus has an atomic number of 15.

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.

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

How many moles of sulfur dioxide are produced when 4.38 moles of oxygen completely react with iron (iv) sulfide