EVERYDAY SCIENCE

Detailed explanation-1: -Mass of one mole(molar mass) aluminum= 27g. Hence, Option 1 is correct.

Detailed explanation-2: -Number of moles in 27 g of Al = = 1 mole.

Detailed explanation-3: -Use the periodic table to check the atomic mass, this is the number of grams per mole → 1 mole of Aluminum is 26.982 g ▪ Written as a fraction this is …

Detailed explanation-4: -13 atoms. Hint: Mole is the unit for the number of atoms or molecules of a material.

Detailed explanation-5: -Assertion (A) : Atomic mass of aluminum is 27. Reason (R) : An atom of aluminum is 27 times heavier than 1/12 th of the mass of the C – 12 atom.