Question

All formulas of mole concept

Answer 1

All formulas of mole concept are :

1) Concentration terms

i) % w/w = [ weight of solute (gm) / weight of solution (gm) ]×100

ii) % w/v = [ weight of solute (gm) / volume of solution (mL) ]×100

iii) % v/v = [ volume of solute (mL) / volume of solution (mL) ]×100

2) Molarity, M = moles of solute / volume of solution (L)

3) Molality, m = moles of solute / amount of solvent (kg)

4) Normality, N = No. of equivalent of solute / Volume of solution (L)

5) Mole fraction, Xa = Na / Nt

where Na = moles of element a and Nt = total moles

6) ppm = [ Parts of solute / Parts of solution ]×100

Answer 2

The number of moles in a given sample of an element/compound can be calculated by dividing the total mass of the sample by the molar mass of the element/compound, as described by the following formula. Therefore, the mass of one mole of an element will be equal to its atomic mass in grams.