A sample of phosphorus that weighs `12.4g` exerts a pressure 8 atm in a `0.821` litre closed vesel at `527^@ C`. The molecular formula of the phosphorus vapour is :

The density of phosphorus vapour at 310^(@)C and 775 torr is 2.64 g dm^(-3) . What is the molecular formula of phosphorus ?

A sample of gas has a volume of 0.2 litre at 1 atm pressure and 0^(@) C. At the same pressure but at 273^(@) C its volume will become

34.05 mL of phosphorus vapour weigh 0.0625 g at 546^(@)C and 1.0 bar pressure. What is the molecular mass of phosphorus? How many atoms are there in one molecule of phosphorus?

A hydrocarbon contains, C = 82.66%, H = 17.34%. The density of the vapour is 0.2308 g/litre at 30^(@)C and 75 torr. The molecular formula of the compound is

When 3.2g of sulphur is vapourised at 450^(@)C and 723 mm pressure , the vapours occupy a volume of 780ml. What is the molecular formula of sulphur vapours under these conditions? Calculate the vapour density also.

If the osmotic pressure of 5g per litre solution of compound at 27^(@)C is 0.025 atm, calculate the molecular mass of the compound.

33.6 cc of phosphorous vapour weighs 0.0625 g at 546^(@)C and 76 cmHg pressure. What is the molecular weight of phosphorous? How many atoms are there in one molecule of phosphorous vapour?