Calculate the number of molecules present in dm^(3) of hydrogen at S.T.P.

Calculate the number of molecules present in 0.5 moles of CO2 ?

Calculate the number of molecules in 1ml of O2 at NTP.

Calculate the number of molecules in 14g of nitrogen gas.

Calculate the total number of electrons present in 2.3g of ethane.

Calculate the total number of electrons present in 1 mole of methane.

Calculate the total number of electrons present in 1.6g of methane.

Calculate the number of molecules of sulphur (S_8) present in 16g of solid sulphur.

Calculate the most probable speed of a molecule of hydrogen at N.T.P. The Boltzmann constant is 1.38 xx 10^-23 J per degree and Avogadro's number is 6 xx 10^26 per kg mole.