Atoms, Molecules and Stoichiometry

Question 1

Define Relative Atomic Mass.

Answer 1

It is defined as the ratio of the average mass of one atom of the element to 1/12 the mass of an atom of Carbon-12 isotope, expressed on Carbon-12 scale.

Question 2

Relative Isotopic Mass

Answer 2

It is defined as the ratio of the mass of one atom of the isotope to 1/12 the mass of an atom of Carbon-12 isotope, expressed on Carbon-12 scale.

Question 3

Relative Molecular Mass

Answer 3

It is defined as the ratio of the average mass of one molecule of the substance to 1/12 the mass of an atom of Carbon-12 isotope, expressed on Carbon-12 scale.

Question 4

Relative Formula Mass

Answer 4

It is defined as the ratio of the average mass of one formula unit of the compound to 1/12 the mass of an atom of Carbon-12 isotope, expressed on Carbon-12 scale.

Question 5

How to find the number of particles in a sample?

Answer 5

No.of moles x Avogadro’s Constant

Question 6

(emf)n = …

Answer 6

molecular formula