The atoms of lead that are in the sample is 0.329 atoms.
Given,
A cube of lead = 1.000 cm on each side.
Density of lead = 11.35 g/cm³
This is calculated below,
The volume of cube = a³ ( where a is the side of the cube )
Side of the cube = 1 cm
So the volume of cube = 1 cm³
Here, a formula will be used,
Density = Mass / Volume
Mass = Density × Volume
= 11.35 g/cm³ × 1cm³ = 11.35 g/cm³
The number of mole of lead = Mass / Molar mass
= 11.35 g/cm³ / 207.2
= 0.054 mol
The one mole of lead contain 6.022 × 10²³ atom
0.054 mole of lead contain 6.022 × 10²³ × 0.054 atom
Hence, 0.054 mole of lead contain 0.329 atoms.
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