Test: Mole Concept - JAMB MCQ

Given that, 1 mole of ammonia is of 17 g. 0.3 mole of ammonia contains 17 x 0.3g of mass. IT’s because the molecular weight of a given pcompound is directly proportional to the number of moles of the given compound.

The corrected statements are as follows: the value of Avogadro’s number is 6.022×10²³ atoms, one molecule of any substance contains Avogadro’s number of particles & 1 u = M_a/N_A. The correct option is that one mole is the amount of a substance that contains as many particles as there are atoms in exactly 12 g of the carbon atom.

Let it be any compound, but one mole of a substance always contains Avogadro’s number of particles. In the above question, Avogadro’s number (6.022×10²³) is given by the letter “y”. so, in 1 mole of glucose, there is y number of particles.

The answer is Avogadro’s number. One mole of any substance contains Avogadro’s number of particles. Avogadro number denoted by N_A. Its value is 602213670000000000000000, also written as 6.022×10²³.

Avogadro number denoted by N_A. Its value is 602213670000000000000000, also written as 6.022×10²³. It’s the number of entities in 1 mol of a substance. The units may be electrons, atoms, ions, or molecules, depending on the nature of the substance.

One mole of sucrose is C₁₂H₂₂O₁₁ The individual mass of carbon is 12 amu, the individual mass of hydrogen is 1 amu & the individual mass of oxygen is 16 amu. But sucrose has 12 carbons, 22 hydrogens and 11 oxygens, that is 12 x 12 + 22 x 1 + 11 x 16 = 342g.

One mole of any substance contains Avogadro’s number of particles. Its value is 6.022×10²³ atoms. But here the question is about 10 moles of a substance. So multiply the Avogadro’s number by 10. Therefore 6.022×10²³ x 10 = 6.022×10²².

One mole of any substance contains Avogadro’s number of particles. Its value is 6.022×10²³ atoms. But here it’s given 12.044 x 10²³ atoms, thereby dividing it by Avogadro’s number; 12.044 x 10²³ atoms/6.022×10²³ atoms = 2 moles. Hence it contains 2 moles of oxygen.

In the above given equation 1 u = M_u/N_A; “u” refers to the atomic mass unit, M_u refers to molar mass constant(Its value is defined to be 1 g/mol in SI units). 1 u = M_a/N_A = 1.660539040 x 10^-27 kg. Hence the above statement is true.

One mole is the amount of a substance that contains as many particles as there are atoms in exactly 12 g of the carbon atom. So S.I. the system took mole as the seventh base fundamental quantity (symbol = mol).