QuestionCalculate the moles in a 3,694 molecule sample of $\mathrm{H}_{2} \mathrm{O}$ . Provide your answer in 4 sig figs in scientific notation.

Studdy Solution

STEP 1

Assumptions1. The given sample contains3,694 molecules of $\mathrm{H}_{} \mathrm{}$ . We are using Avogadro's number, which is $6.022 \times10^{23}$ molecules per mole

STEP 2

We can calculate the number of moles by dividing the number of molecules by Avogadro's number.
$Moles = \frac{Number\, of\, molecules}{Avogadro's\, number}$

STEP 3

Now, plug in the given values for the number of molecules and Avogadro's number to calculate the number of moles.
$Moles = \frac{3,694}{6.022 \times10^{23}}$

STEP 4

Perform the division to calculate the number of moles.
$Moles = \frac{3,694}{6.022 \times10^{23}} =6.134 \times10^{-21}$ The number of moles in a3,694 molecule sample of $\mathrm{H}_{2} \mathrm{}$ is $6.134 \times10^{-21}$ moles.

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