Question

how many molecules are there in one mole of barium chloride?

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1.20*10^24

1.50*10^23

6.02*10^23

2.40*10^24

Explanation:

Step1: Recall Avogadro's number

Avogadro's number \(N_A = 6.02\times10^{23}\text{ molecules/mol}\)

Step2: Use the formula for number of molecules

The number of molecules \(N\) in \(n\) moles of a substance is given by \(N=n\times N_A\). Here, \(n = 1\) mole.
Substituting \(n = 1\) and \(N_A=6.02\times 10^{23}\text{ molecules/mol}\) into the formula, we get \(N = 1\times6.02\times10^{23}=6.02\times10^{23}\) molecules.

Answer:

\(6.02\times 10^{23}\) (corresponding to the option \(6.02\times10^{23}\))