Calculate the mass of 500 cc of hydrogen at STP.
The density of hydrogen gas at STP is 0.0899g/L, so 500 cc would have a mass of
0.0899×5001000 = 44.95 mg
ans. 45 mg (round off)
so the ans is A
The osmotic pressure of a 0.010 M MgSO4 solution at 500 K is 0.82 atm. Calculate , the van't Hoff factor, for this MgSO4 solution.
When magnesium metal reacts with sulphuric acid it forms magnesium sulphate along with the evolution of hydrogen gas.
Mg+H2SO4→MgSO4+H2
For experimental studies the conditions of the reaction was modified and rate of reaction was monitored. In which of the following case the occurance of the reaction is fastest?