Question detail

How many particles are in 2 moles of a substance?

Try the question, check the answer, then read the explanation to understand the curriculum point.

Show answer Topic hub Objective page

At a glance

MCQ

Type

practice

Style

Topic

Amount of substance

Question

A. 1.2 x 10^24 particles
B. 3.0 x 10^23 particles (A-level cue 199643a1 distractor 1)
C. 6.02 x 10^23 particles (A-level cue 199643a1 distractor 2)
D. 1.0 x 10^23 particles (A-level cue 199643a1 distractor 3)

Answer

1.2 x 10^24 particles

Explanation

The correct option is 1.2 x 10^24 particles. 1.2 x 10^24 particles is correct because it supports the objective: Calculate amounts using particle number and the Avogadro constant.. The reasoning stays within The mole and the Avogadro constant and avoids drifting into a similar A-Level Chemistry idea. This item is treated as conceptual revision rather than a formal calculation item because the validated answer is an explanation or option choice, not a worked numerical response.

Common mistake

Common Mistake in Avogadro Constant Calculations

Students often forget to convert the particle number to moles using the Avogadro constant before performing calculations.

To fix this, remember the formula: n = N / L, where n is the number of moles, N is the number of particles, and L is the Avogadro constant (6.022 x 10^23 mol^-1). For example, if you have 1.2044 x 10^24 particles, substitute: n = 1.2044 x 10^24 / 6.022 x 10^23 = 2.00 moles.

Related flashcards

Flashcard 1 of 5

Press Space to flip, arrows to move