11. what is the mass of 30,000 molecules? express your answer in scientific notation. mass of one molecule of oxygen = 5.3 × 10⁻²³ gram

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Accepted Answer

# Explanation:
## Step1: Convert 30,000 to scientific notation
$30000 = 3\times10^{4}$
## Step2: Multiply the number of molecules by the mass of one molecule
$$
\begin{align*}
\text{Total mass}&=(3\times 10^{4})\times(5.3\times 10^{-23})\
&=(3\times5.3)\times(10^{4}\times10^{-23})\
& = 15.9\times10^{4 + (-23)}\
&=15.9\times10^{-19}\
&=1.59\times10^{-18}\text{ gram}
\end{align*}
$$

# Answer:
$1.59\times 10^{-18}\text{ gram}$

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Question

Explanation:

Step1: Convert 30,000 to scientific notation

Step2: Multiply the number of molecules by the mass of one molecule

Answer: