Which of the following information is necessary to describe an object's motion?

a: speed

b: position, direction, and speed

c: position

d: direction

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?

What properties would have caused early researchers to name hydrogen "inflammable air”