Question d6d72

Mar 29, 2017

$\text{2 moles}$.

Explanation:

You have $\text{196 grams}$ of ${\text{H"_2"SO}}_{4}$.

We can calculate the molar mass of sulfuric acid by looking at the periodic table.

$\text{H": "1 g" * "2" = color(red)"2 g}$
$\text{S": color(red)"32 g}$
$\text{O": "16 g" * "4"= color(red)"64 g}$
$- - - - - -$
Total = color(red)["98 g"

This means for every $\text{1 mole}$ of ${\text{H"_2"SO}}_{4}$, you have $\text{98 grams}$ of it.

We can use a conversion factor to solve for number of moles in $\text{196 grams}$ of ${\text{H"_2"SO}}_{4}$.

color(white)(aaaaaaaaaaa)(196 cancel"g")/1 * ("1 mole")/(98 cancel"g") = color(orange)["2 moles H"_2"SO"_4#