The atomic masses of cl 35(75.53 percent) and cl 37 ( 24.47 percent) are 34.968 amu and 36.956 amu. calculate the average atomic mass of chlorine.

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

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml