Dorothy Perkins, Huddersfield Opening Hours. Below are the normal opening hours for Dorothy Perkins, Huddersfield. For seasonal (e.g. Christmas & Easter) and bank holiday opening hours please visit Dorothy Perkins's website.or seasonal (e.g. Christmas & Easter) and bank holiday opening hours please visit Dorothy Perkins's website.
Hydrogen sulfide, H2S has a molar mass of  34.08088g/mol.
Since one mole of gas occupies 22.4 L at STP, the molecular weight of the gas is 30.6 g molÂ¯1. 11.2 L at STP is one-half molar volume, so there is 0.5 mol of gas present. Therefore, the molecular weight is 80.0 g molÂ¯1. This problem, as well as the two just above can be solved with PV = nRT.