Question

How many initial mols are there of Ethyl Acetate according to this information? How do you calculate it?

Volume = 5.00ml
Density = 0.893 g/ml
Molar Mass (M) = 88.11 g/mol

Answer 1

`0.0636` moles

Explanation:

From the volume and density we can calculate the mass (grams). From the grams we use the Molar Mass to calculate the moles.

Setting up an equation with "Dimensional Analysis" to get from what you know to what you want to know is the best way to do these kinds of problems.
We WANT "moles" FROM mL, g/mL and g/mol information.
`"moles" = (mL/(g/"mL"))/(g/"mol"`

In steps:
`"mL"/(g/"mL") = grams` ; `5.00/0.893 = 5.60` grams

`"grams"/(g/"mol") = mol` ; `5.60/88.11 = 0.0636` moles