How many of C8H8's electrons has it gained/lost?

[mono_ten]

Homework Statement

Assume the formula for styrofoam (a polymer containing carbon and hydrogen) is C8H8. In a .25g styrofoam peanut, how many electrons and protons are present if it carries no excess charges? How many Coulumb's of + and - charge does this stand for? How many of the peanut's electrons has been gained/lost if the peanut has an excess charge of +0.10 C?

Homework Equations

The Attempt at a Solution

Well, if this is a typical chemistry problem, in the beginning... I would convert grams to molecules using Avogadro's number.
Not sure how to find the number of protons and electrons after that though. Doesn't it have to do with the atomic number?
After that, I'm not exactly sure how to find Coulumb's of the + and - charges.

 

[Stovebolt]

The Attempt at a Solution

Well, if this is a typical chemistry problem, in the beginning... I would convert grams to molecules using Avogadro's number.

Good start.

Not sure how to find the number of protons and electrons after that though. Doesn't it have to do with the atomic number?

The number of protons in a single atom of a given element is equal to the atomic number. If the sample contains no excess charges, you should be able to find the number of electrons based on the number of protons.

After that, I'm not exactly sure how to find Coulumb's of the + and - charges.

An elementary charge (the charge of one proton (+) or electron (-)) is equal to 1.602 × 10^–19 Coulombs.