01 Mole Concept

Question 1

What is the relative atomic mass (Ar) ?

Answer 1

Ar of an element is defined as the ratio of the average mass of one atom of the element to 1/12 of the mass of an atom of 12C isotope

Question 2

What is relative isotopic mass ?

Answer 2

Isotopic mass of a particular isotope is defined as the ratio of the ass f one atom of the isotope to 1/12 of the mass of 12C isotope

Question 3

What is relevant molecular mass ?

Answer 3

Mr of a substance is the ratio of average mass of one molecule of the substance to 1/12 of the mass of 12 isotope

Question 4

What are isotopes ?

Answer 4

Atoms of the same element that have the same number of protons but different number of neutrons

Question 5

What is empirical formula ?

Answer 5

Simplest ratio of the atoms of the different elements or substances in teh compound

Question 6

What is molecular formula ?

Answer 6

The actual number of atoms of each element in a compound