- #1

tish

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I have been out of school for 20yrs. and have no clue as to how to do this.[

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- Thread starter tish
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- #1

tish

- 1

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I have been out of school for 20yrs. and have no clue as to how to do this.[

- #2

TD

Homework Helper

- 1,022

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In that case, 1 mol is a number of particles which equals Avagadro's constant, approx 6.0221415 × 10^23. The mass of a proton is 1.6726231 x 10^-27 kg.

- #3

Chi Meson

Science Advisor

Homework Helper

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Start with the size of the proton which is on at the order of a femptometer (10^-15 m). Since a mililiter is the same as a cubic centimeter, you could say a proton is 10^-13 cm across, therefore 10^13 protons lined up in a row would be 1 cm long.

Cube this number, and you have the number of protons that "fill up" a milliliter: 10^39 protons. Where did that electrostatic force go anyway?

So if each proton has a mass of 1.7 x 10^-27 kg, then the milliliter "full" of protons would have a mass of 1.7 x 10^12 kg. That's about two trillion kilograms.

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