Mole Concept

Question 1

relative atomic mass

Answer 1

weighted average of the isotopic mass of one atom of an element relative to 1/12 mass of one atom carbon-12

Question 2

isotopic mass

Answer 2

mass of one atom of the isotope relative to 1/12 the mass of one atom of carbon-12

Question 3

relative Molecular mass

Answer 3

weighted average of the masses of one molecule relative to 1/12 the mass of one atom of carbon-12

Question 4

formula mass:

Answer 4

weighted average of the masses of one formula unit relative to 1/12 the mass of one atom of carbon-12

Question 5

mole (in terms of AVOGADROS CONSTANT) :

Answer 5

one mole of a substance is amount of that substance which contains same number of particles as there are atoms in 12.0g of C-12 isotopes and has a value of 6.02x10^23

Question 6

empirical formula:

Answer 6

simplest formula that shows simplest whole number ratio of atoms of each element present in the compound

Question 7

molecular formula

Answer 7

shows actual number of atoms of each element in one molecule of compound. It is simple multiple of empirical formula and can only be obtained if molar mass is known.