Question

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

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. So, \(N=1\times6.02\times 10^{23}\) molecules.

Answer:

\(6.02\times 10^{23}\) (the first option \(6.02*10^{23}\))