How many moles of carbon atoms are there in 0.500 mol of C2H6?

How many moles of gas are present if p=11 atm, v=12l, t=185k?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

Calcium carbonate decomposes at high temperatures to give calcium oxide and carbon dioxide as shown below. caco3(s) cao(s) + co2(g) the kp for this reaction is 1.16 at 800°c. a 5.00 l vessel containing 10.0 g of caco3(s) was evacuated to remove the air, sealed, and then heated to 800°c. ignoring the volume occupied by the solid, what will be the mass of the solid in the vessel once equilibrium is reached?