MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryMole _ Equivalent ConceptAtomic and Molecular Masses

Which has the highest mass ?

A.50 g of iron

B.5 moles of N₂✓ Correct

C.0.1 mol atom of Ag

D.1023 atoms of carbon

Explanation

a) 50g of Iron (Given) b) 5 moles of 2 N 1 mole of 2 N weights 28g 5 moles of 2 N will weight = 5 28 140g x c) 0.1 mole of Ag 1 mole of Ag weighs 108g 0.1 mole of Ag will weigh= 0.1 108 10.8g x d) 23 10 atoms of C 1 mole i.e. 23 6.023 10 x of C weigh 12g 23 10 atoms of C will weigh 23 23 10 12 6.023 10 g x x 1.99 2g The correct option is (b) Note:-weight in g= moles xAt. wt. or molecular weight 23 6.023 10 number of atomsor molecules x x At. wt. or mol.wt.

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