Question

How many grams of CO2 would be needed to have the same number of moles of CO2 as there are in 52.2 grams of H2O?

Answer 1

`"2.90 mol H"_2"O"` contain `"52.2 g H"_2"O"`.

`"2.90 mol CO"_2"` contain `"128 g CO"_2`.

Explanation:

Moles Water

Determine the number of moles of `"H"_2"O"` in that contains `"52.2 g H"_2"O"`. The molar mass of water is `"18.015 g/mol"`.

`52.2color(red)cancel(color(black)("g H"_2"O"))xx(1"mol H"_2"O")/(18.015color(red)cancel(color(black)("g H"_2"O")))="2.90 mol H"_2"O"` rounded to three significant figures

Mass Carbon Dioxide

Determine the mass of carbon dioxide in `"2.90 mol"` carbon dioxide. The molar mass of carbon dioxide is `"44.009 g/mol"`.

`2.90color(red)cancel(color(black)("mol CO"_2))xx(44.009"g CO"_2)/(1color(red)cancel(color(black)("mol CO"_2)))="128 g CO"_2"` rounded to three significant figures