"calculate the number of columbs of positive charge in 250cm^3 of (neuteral) water. hydrogen has 1 protons and oxygen 8 protons"

i know the answer is 1.3 x 10^7 columbs... just can figure out how to get that answer

any ideas would be greatly appriciated

1/8/2006 11:46:47 PM

School hasn't started and you already have webassign hw? That seriously sucks.

1/9/2006 12:08:22 AM

yea, damn online class - webassin opened on sat, and is due tues

1/9/2006 12:41:05 AM

cm^3 and m^3 is a world of difference. i think x1e-6 different. not sure on the factor tho

1/9/2006 7:23:29 AM

remember that the density of water is 1 gram per cm^3. So find the moles of water in 250 cm^3, and that will give you the number of atoms. From there you can find the number of protons, then multiply that by 1.6e-19 Columbs.

1/9/2006 7:49:17 AM

yea that's what i did... turns out my sig figs were wrong... damn webassign

1/9/2006 2:10:35 PM