(a) Define the following : (b) Calculate the mass of the following:

(i) Mole

(ii) Gram atomic – mass

(iii) Gram molecular mass

(i) 2 moles of carbon dioxide

(ii) 6.022 x 10²³ molecules of carbon dioxide.

Ans. (a) (i) Mole: One mole of any species (atoms, molecules, ions or particles) is that quantity in number (i.e., 6.022 x 1023) having a mass equal to its atomic or molecular mass in grams.

(ii) Gram atomic mass: It is the mass of an atom in grams that is equal to exactly one-twelfth (1/12th) the mass of one atom of carbon -12

(iii) Gram molecular mass: It is the sum of the atomic masses in grams of all atoms present in a molecule.

(b) (i) Mass of 2 moles of carbon dioxide (CO_₂) is (2 x 44) u = 88 u.

(ii) Mass of 6.022 x 10²³ molecules of CO₂ is 44 u.

Follow on Facebook page – Click Here

Google News join in – Click Here

Read More Asia News – Click Here

Read More Sports News – Click Here

Read More Crypto News – Click Here