Chemistry
If phosphorus is considered to contain P4 molecules, then calculate the number of moles in 100 g of phosphorus?
Related Questions
Determine the number of molecules in a drop of water which weighs 0.09 g.
The molecular formula for elemental sulphur is S8. In a sample of 5.12 g of sulphur:
(a) How many moles of sulphur are present?
(b) How many molecules and atoms are present?
Calculate:
(a) The gram molecular mass of chlorine if 308 cm3 of it at S.T.P. weighs 0.979 g.
(b) The volume of 4 g of H2 at 4 atmosphere.
(c) The mass of oxygen in 2.2 litres of CO2 at S.T.P.
A student puts his signature with graphite pencil. If the mass of carbon in the signature is 10-12 g, calculate the number of carbon atoms in the signature.