Calculate number of moles and molecules of acetic acid present in 22g of it.

Calculate the number of moles and molecules of urea present in 5.6 g of urea.

Calculate the number of moles and molecules of ammonia present in 5.6dm^3 of its volume at STP.

Calculate the number of moles and molecules of ammonia (NH_3) gas in a volume 67.2 dm3 of it measured at STP.

Calculate the number of moles and molecules of sulphur dioxide obtained by combustion of 6.4 xx 10^-2 kg of sulphur (S=32 , O= 16)

Calculate the number of atoms in 52 moles of Argon (Ar)

Calculate the number of moles of hydrogen and gas present in 0.5 m^3 sample of hydrogen gas at a pressure of 101.325 Pa and at 27^@C .

Calculate the number of atoms in 52 g of Helium (He)

Calculate the number of moles of magnesium oxide, MgO in 10 g of the compound. (Average atomic masses of Mg =24 and O =16)

Calculate the number of moles of magnesium oxide, MgO in 80 g of the compound. (Average atomic masses of Mg =24 and O =16)