How could you identify the bottle
contng Hel using commonia gas ? (2)​

2points why do scientists need governmental funding? o a. government politicians ask all the important scientific questions. o b. scientists have to pay taxes to the government on the money they make. o c. the cost of doing scientific research can be very high. o d. the government is controlled by scientists. submit

Calculate the number of molecules present in 0.750 mol of mgo.

How have the greenhouse gasses increased from the year 2000 to 2018