how many moles are in 2 x 10^{24} molecules of h_{2}o?
0.295 mole
3.32 mole
1.13 x 10^{24} mole
1.44 x 10^{48} mole

Question

Accepted Answer

# Answer:
B. 3.32 mole

# Explanation:
## Step1: Recall Avogadro's number
Avogadro's number $N_A = 6.022\times 10^{23}\text{ molecules/mol}$
## Step2: Use the formula $n=\frac{N}{N_A}$
Given $N = 2\times 10^{24}\text{ molecules}$, then $n=\frac{2\times 10^{24}}{6.022\times 10^{23}}$
$$
\begin{align*}
n&=\frac{2}{6.022}\times\frac{10^{24}}{10^{23}}\
&=\frac{2}{6.022}\times10\
&\approx 3.32\text{ mol}
\end{align*}
$$

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Question

Explanation:

Step1: Recall Avogadro's number

Step2: Use the formula \(n=\frac{N}{N_A}\)

Answer: