find partial pressure of cl2 gas in a mixture that contains 46.5% n2, 12.7% ne, 40.8% cl2 by mass stp

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

How many atoms are there in 5.70 mol of mg

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?