STOICHIOMETRY

The masses of individual atoms and molecules are expressed in

• Grams

• Moles

• AMU

• Molecules

The masses of given numbers of moles of substances are expressed in

• Grams

• Moles

• AMU

• Molecules

The aspect of chemistry which deals with quantities of substances is

Atomic weight molecular weight and formula weight are chemical terms denoting

• Molecules

• Mass

• Atoms

• Volumes

The relative numbers of atoms of the respective element in a molecule refers to

• Formula weight

• Molecular formula

• Formula unit

• Molecular weight

What is the percentage composition of Nitrogen in TNT?(N=14, O=16, C=12, H=1)

• 18.7

• 19

• 18.5

• 19.7

If the identity of a compound is unknown, what is the only deducible formula (tick all that apply)

• Molecular formula

• Simplest formula

• Empirical formula

• Chemical formula

Compounds consist of molecules or

The following pairs of existing compounds have the same empirical formula except

• NO2, N2O4

• Benzene, Ethyne

• NH3, N2H6

• Glucose, formaldehyde

For a substance that exists in the form of molecules its molecular formula can be deduced from the knowledge of its

• Empirical formula only

• Percentage composition only

• Molecular weight only

• A and C

• All