10 grams of Helium
2 moles of Helium
1.8 x 10 to the 24th power atoms of Helium
2007-05-19 06:54:45 · 4 answers · asked by chemistry bum 1 in Science & Mathematics ➔ Chemistry
1.8 x 10^24 atoms has more mass
10g/4g/mol=2.5 moles so>2 moles
2.5 moles *(6.02*10^23 atoms/mol)
=1.505*10^24 atoms
1.8*10^24/(6.02*10^23 atoms/mole)=2.99 moles
2.99*4moles/g=11.96g
2007-05-19 07:47:05 · answer #1 · answered by Anonymous · 0⤊ 0⤋
1 mole of He has 4 grams, so you can compare the first two.
One mole of He has 6.02 E23 molecules. Now you can also compare the third item
2007-05-19 14:04:13 · answer #2 · answered by reb1240 7 · 0⤊ 0⤋
if one is stationary and other is moving almost with a speed of light the latter's mass will be more than its stationary
m=m'/ square root of 1-(v^2/c^2)
2007-05-19 14:07:59 · answer #3 · answered by smart_lover 2 · 0⤊ 0⤋
no idea...
2007-05-19 13:57:28 · answer #4 · answered by MasterShrub 2 · 0⤊ 0⤋