Question

pearson
learning: molecules and compounds calculations
return
question ⓘ
mole is a latin word for \pile.\ more specifically, a mole is a pile that contains $6.022 \times 10^{23}$ particles or objects. these particles are typically atoms,
molecules, or ions. a mole is a counting number that means $6.022 \times 10^{23}$ just
as a dozen means 12.
calculate the number of molecules of $so_2$, if you begin with 2.98 moles of
$so_2$.
answer
$\bigcirc$ $1.79 \times 10^{24}$ molecules of $so_2$
$\bigcirc$ $4.96 \times 10^{-24}$ of $so_2$ molecules
$\bigcirc$ $2.02 \times 10^{23}$ molecules of $so_2$
$\bigcirc$ $5.59 \times 10^{-25}$ of $so_2$ molecules
$\bigcirc$ i dont know yet

Explanation:

Step1: Recall mole-particle conversion

1 mole = $6.022 \times 10^{23}$ particles

Step2: Multiply moles by Avogadro's number

$\text{Number of molecules} = 2.98 \times 6.022 \times 10^{23}$
Calculate the product: $2.98 \times 6.022 = 17.94556$, so $\text{Number of molecules} = 17.94556 \times 10^{23} = 1.794556 \times 10^{24}$

Answer:

1.79 × 10²⁴ molecules of SO₂