The number of electrons in 1.6 grams of methane is 11 | Atomic mass, molecular mass and mole...

Stoichiometry, Atomic Mass, Molecular Mass And Mole Concept

(i) Calculate the number of electrons which will together with one gram . (ii) Calculate the mass and charge on one mole of electrons .

A mole is a collection of 6.022 xx 10^23 particles and the number 6.022 xx 10^23 is called Avogadro number. The mass of this number of atoms in an element is equal to its gram atomic mass and mass of this number of molecules in a compound is equal to its gram molecular mass. The volume occupied by this number of molecules of a gas at N.T.P is 22.4 L. When 6.022 xx 10^23 molecules of a substance are dissolved in 1L of solution, the solution is known as 1 molar volume. One million atoms of silver (at. mass = 107.81) atoms weigh

Atoms and molecules are so small in size that it is neither possible to count them individually nor possible to determine their mass. These are counted collectively in terms of Avogadro's number. The mass of Avogadro's number of atoms and molecules of a substance is known as gram atomic mass and gram molecular mass respectively. The volume occupied by Avogadro's number of molecules of a gas or vapour, is known as molar volume. The number of molecules in 16 g of methane is