__________ defined as mass of 1 mole of molecules of an element.

Calculate the amount of water (g) produced by the combustion of 16g of methane.

H₂ is

Find the molecular mass of CH₄

Gram atom is defined as atomic weight expressed in grams. H contains ______________ atom.

_________are made up of two or more substances mixed in any ratio.

Calculate the number of He atoms in 52 u

__________ which do not involve any chemical reactions.

________mixtures are those Which have same composition throughout.