How many molecules of methane gas (CH4) are in 32.1 grams of methane?
(Atomic masses: C = 12.01 and H= 1.01)

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Consider the point on the plot where 10.0 g of naoh have been added. what amount of naoh, in moles, has been added? 0.308 mol fecl3 initially present

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure