Chemistry Examples

$H$

Step 1

To calculate the mass of a single atom, first look up the atomic mass of $H$ from the periodic table. This is also the mass in grams of 1 mole of $H$ .

$1.01$

Step 2

Use Avogadro's number to find the mass of a single atom.

$\frac{1.01}{6.022 \cdot 10^{23}}$

Step 3

Simplify the expression.

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Step 3.1

Divide using scientific notation.

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Step 3.1.1

Group coefficients together and exponents together to divide numbers in scientific notation.

$(\frac{1.01}{6.022}) (\frac{1}{10^{23}})$

Step 3.1.2

Divide $1.01$ by $6.022$ .

$0.16771836 \frac{1}{10^{23}}$

Step 3.1.3

Move $10^{23}$ to the numerator using the negative exponent rule $\frac{1}{b^{n}} = b^{- n}$ .

$0.16771836 \cdot 10^{- 23}$

Step 3.2

Move the decimal point in $0.16771836$ to the right by $1$ place and decrease the power of $10^{- 23}$ by $1$ .

$1.67718365 \cdot 10^{- 24}$