Answer:
see the pic for the answer
What is the density of a 40 gram object with a volume of 20 milliliters?
2 answers:
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Answer:
0.0560 mol
Explanation:
You need to use the ideal gas law equation:
P = 750 torr
V = 1.35 L
n = moles
R = 62.364 L torr
T = 17.0 ˚C + 273.15 = 290.15 K
Rearranging the equation for n:
n = 0.0560 mol
Hey there!
One mole of magnesium has a mass of 24.31 g.
This is 6.022 x 10²³ atoms of magnesium.
We want to convert 9.00 x 10²² atoms to moles.
For every one mole of magnesium, there are 6.022 x 10²³ atoms, so divide:
(9.00 x 10²²) ÷ (6.022 x 10²³) = 0.15 moles
Convert 0.15 moles to grams.
For every mole, there is 24.31 g.
So we multiply by 24.31. Also note that I am using the number stored in the calculator and not the rounded number I put.
0.15 × 24.31 = 3.6
The mass of 9.00 x 10²² atoms of Mg is 3.6 grams.
Hope this helps!