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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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obamab obamab
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11 years ago
The question of whether the universe will continue to expand, remain stable or collapse
depends in part upon achieving a minimum density of 6.02?10-27kg/m3 throughout the
universe. How many neutrons, protons and electrons per cubic meter are required to
achieve this minimum density? Assume an equal number of protons and electrons, and
1.5 times as many neutrons as protons. Use at least 9 significant digits in your
intermediary calculations.
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wrote...
#1
11 years ago
It's over nine thousand.
wrote...
#2
11 years ago
I'll set up the formulas and you can do the 9-digit calculations.
N*(mP+me+1.5mN) = 6.02E-27
N = 6.02E-27/(mP+me+1.5mN)
nP = ne = N
nN = 1.5 N
Expect N ~= 1.43.
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