2.8 kg is equal to
a) 2.8*10^6 dg
b)2.8*10^6 mg
c)2.8*10^-6 mg
d)2.8*10^6 g

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?

Calculate the percent composition by mass of each element in al(oh)3. use at least three significant figures.

How many liters of 3.0 m naoh solution will react with 0.60 liters of 4.0 m h2so4? h2so4 + naoh → na2so4 + h2o 1.2 l 1.6 l 2.4 l 2.8 l