Question

an oxygen atom has a mass of 2.66×10^(-23) g and a glass of water has a mass of 0.050 kg. use this information to answer the question below. be sure your answers have the correct number of significant dig what is the mass of 1 mole of oxygen atoms? g

Explanation:

Step1: Recall Avogadro's number

Avogadro's number $N_A = 6.022\times 10^{23}\text{ atoms/mol}$.

Step2: Calculate mass of 1 - mole of oxygen atoms

Multiply mass of one oxygen atom by Avogadro's number. Mass of one oxygen atom $m = 2.66\times 10^{-23}\text{ g}$. So mass of 1 - mole of oxygen atoms $M=m\times N_A=(2.66\times 10^{-23}\text{ g})\times(6.022\times 10^{23}\text{ atoms/mol})$.
\[

$$\begin{align*} M&=(2.66\times6.022)\text{ g/mol}\\ &= 15.91852\text{ g/mol}\approx15.9\text{ g/mol} \end{align*}$$

\]

Answer:

$15.9$