This is from my chemistry assignment : 1) You have a tank of N2 gas. If the tank contains 11.65 L of the gas (at STP), how many molecules of N2 are in it?
can someone pls explain how I would answer this and what equation I would use ?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Nitric acid can be formed in two steps from the atmospheric gases nitrogen and oxygen, plus hydrogen prepared by reforming natural gas. in the first step, nitrogen and hydrogen react to form ammonia: (g) (g) (g) in the second step, ammonia and oxygen react to form nitric acid and water: (g) (g) (g) (g) calculate the net change in enthalpy for the formation of one mole of nitric acid from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?