Question

How many moles of CO2 are present in 225g?I also need an explanation

Answer 1

Let's see that in the periodic table, we have the molar mass of every element. In this case, carbon has a molar mass of 12 g/mol and oxygen of 16 g/mol. The conversion from grams to moles is dividing the mass by the sum of the molar mass of the compound.

In this case, we have 1 atom of carbon and two atoms of oxygen. Doing the algebraic sum for each of them with their molar mass we're going to obtain:

`\text{Molar mass of CO}_2=1\cdot12(g)/(mol)+2\cdot16\frac{g\text{ }}{mol}=44\frac{g\text{ }}{mol}`

So, 225 g of carbon dioxide will be:

`225gCO_2\cdot(1molCO_2)/(44gCO_2)=5.11molCO_2.`

So, finally, we have 5.11 moles in 225 grams of CO2.