Atoms are typically spaced about 0.2 nm apart. At that spacing, how many atoms would be found in a line [02] inches long?
(b) How many kg of water are in 5.17 cubic inches (in3)?
d = spacing between two adjacent atoms = 0.2 nm = 0.2 x 10-9 m
D = length of the line = 2 inch = 2 x 0.0254 m = 0.0508 m
n = number of atoms
Number of atoms is given as
n = D/d
n = 0.0508/( 0.2 x 10-9 )
n = 2.54 x 108
b)
V = Volume of water = 5.17 in3 = 5.17 (0.0254)3 m3 = 8.5 x 10-5 m3
= density of water = 1000 kg/m3
mass of water is given as
m = V
m = 1000 x 8.5 x 10-5
m = 0.085 kg
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