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3 years ago

The number of carbon atoms in 45.21g C

Chemistry

1 answer:

Inga [223]3 years ago

7 0

Answer:

2.26 X10^24 carbon atoms

Explanation:

The number of carbon atoms in 45.21g C

carbon has an atomic mas of 12.01 gm

45.21 g has 45.21/12.01 = 3.76 moles of C

a mole contains Avogadros number of particles

6.022 X 10^23

3.76 moles contain 3.76 X6,022 X 10^23 =

2.26 X10^24 carbon atoms

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An ideal gas in a cylindrical container of radius r and height h is kept at constant pressure p. The bottom of the container is

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Answer:

$m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}$

Explanation:

The gas ideal law is

PV= nRT (equation 1)

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$\frac{m}{mw} =\frac{PV}{RT}$ or

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Since the temperatures has linear distribution, we can say that the temperature in the cylinder is the average between the temperature in the top and in the bottom of the cylinder. This is:

$T =\frac{T_{1} + T_{O}}{2}$

Replacing these values in the equation 2 we get:

$m =\frac{P*V*mw}{R*T}$ (equation 2)

$m =\frac{p*(pi)*r^{2}*h*mw}{R*\frac{T_{1} + T_{O}}{2}}$

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