POAC problem||Atomic weight & valency calculation||Concentration term

POAC problem||Stoichiometry problem

Problems Based on Concept of gram atom| Concept of gram mole and Concept of gram equivalent |Concentration terms (Mole Fraction, Mass Fraction, Molarity, Molality and Normaility)

Problems Based on Concept of gram atom| Concept of gram mole and Concept of gram equivalent |Concentration terms (Mole Fraction, Mass Fraction, Molarity, Molality and Normaility)

Under standard conditions the density of a helium (atomic weight =m_(1) ) and nitrogen (atomic weight m_(2) ) mixture is rho . Find the concentration of the helium atoms in the mixture.

Atomic Mass Unit|Average Atomic Mass |Mole Concept |Empirical Formula And Molecular Formula |Concentration Terms|Concentration Terms-Molarity|Limiting Reagent|OMR

Concentration of Solutions Problems

The number of valence electrons in carbon atom is

Concentration Terms In A Simple Way|Concentration Terms - Molarity|Numerical|Concentration Terms - Molality|OMR