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3 years ago

The density of solid W is 19.3 g/cm3. How many atoms are present per cubic centimeter of W?

1 answer:

4 0

How many atoms are present per cubic centimeter of W?

Since it is a BCC cell, then it will have 4 atoms per unit cell.

As a solid, W adopts a body-centered cubic unit cell. How many unit cells are present per cubic centimeter of W?
(19.3 g/cm^3)( 1 mol / 183.84 g) ( 6.022x10^23 atoms / 1 mol ) ( 1 cell / 4 atoms) = 1.58x10^22 cells / cm^3

Hope this helps.

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2. Hardest natural substance

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3. Used as lubricant

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4. nonconductor

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2 years ago

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2 years ago

Vanyuwa [196]

Answer:

If the volume of a gas increased from 2 to 6 L while the temperature was held constant, the pressure of the gas decreased by a factor of 3.

Explanation:

Boyle's law that says "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure." This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.

Boyle's law is expressed mathematically as:

Pressure * Volume = constant

P * V = k

To obtain the proportionality factor k you must make the quotient:

$k=\frac{V2}{V1} =\frac{6 L}{2 L}$

k= 3

This means that if the volume of a gas increased from 2 to 6 L while the temperature was held constant, the pressure of the gas decreased by a factor of 3.

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