how many molecules are in 5 moles of o₂?\na. 3.010×10²³\nb. 3.010×10²⁴\nc. 6.02×10²⁴\nd. 3.10×10²⁴
how many molecules are in 5 moles of o₂?\na. 3.010×10²³\nb. 3.010×10²⁴\nc. 6.02×10²⁴\nd. 3.10×10²⁴
Answer
Explanation:
Step1: Recall Avogadro's number
Avogadro's number ($N_A$) is $6.02\times 10^{23}$ molecules/mol.
Step2: Calculate the number of molecules
We use the formula $N = n\times N_A$, where $n = 5$ mol and $N_A=6.02\times 10^{23}$ molecules/mol. So $N=5\times6.02\times 10^{23}=3.01\times 10^{24}$ molecules.
Answer:
B. $3.010\times 10^{24}$