Which of the following statements is/are correct?
i.A mole of sodium atoms (atomic mass = 23.0 u) contains fewer atoms than a mole of potassium atoms (atomic mass = 39.1 u)
ii.A mole of sodium atoms (atomic mass = 23.0 u) contains more atoms than a mole of potassium atoms (atomic mass = 39.1 u)
iii.In effect,the word mole represents the number 6.02 × 10²³
iv.One mole of a substance contains as many particles as there are atoms in 12 grams of carbon-12
v.One mole of molecular nitrogen contains as many molecules as 24.0 u of carbon-12

Question

Quizplus · Accepted Answer

i. is incorrect because a mole of any substance contains the same number of particles, which is Avogadro's number (6.02 × 10^23).
ii. is incorrect for the same reason as i.
iii. is correct, as a mole represents a certain number of particles (Avogadro's number).
iv. is also correct, as a mole of any substance contains Avogadro's number of particles, and it has been defined as the number of atoms in 12 grams of carbon-12.
v. is incorrect, as the number of molecules in one mole of any substance is always equal to Avogadro's number, regardless of its atomic mass or molecular weight.

Which of the Following Statements Is/are Correct