# Homework Help: Balloon losing electrons

1. Jan 26, 2008

### sonastylol

[SOLVED] Balloon losing electrons

1. The problem statement, all variables and given/known data
You have a neutral balloon. The charge of an electron is -1.6x10^-19C.
What is its charge after 19000 electrons have been removed from it? Answer in units
of microcoulombs.

2. Relevant equations
I THINK Q = Ne

3. The attempt at a solution
This question should be very easy but for some reason Im hesitant to answer it any more because I lose points every time I do it. I understand that when you remove electrons from an object the particle becomes positively charged, so this rules out a negative answer.

I tried 19000 x 1.6x10^-19 and submitted that answer = 3.04x10^-15
I also tried 19000 x 1.6x10^-19 x 10^-6 ( converting to microC ), and that answer was still wrong = 3.04x10^-21

What am I doing wrong? This seems too simple ... :(
Thank you!

2. Jan 26, 2008

### Staff: Mentor

You are doing your conversion backwards! Divide by 10^-6.

3. Jan 26, 2008

### sonastylol

oh god.

thanks a bunch