Chemistry, 25.08.2019 19:50 dan20012001

The force of attraction that the earth exerts on all objects is called

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The force of attraction that the earth exerts on all objects is called gravitational force. The gravitational force is the force that has the property of attracting any object having a mass. Without this gravitational force it would not have been possible for anything to remain on earth. Everything would start floating without the gravitational pull of earth. There are actually four kind of forces that are considered in physics. They are the strong force, weak force, gravitational force and the electromagnetic force. It is absolutely true that every object is pulling other objects due to the forces present in nature.

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Determine the wavelength of light emitted when an electron in an li2+ ion makes a transition from an orbital with n = 6 to an orbital with n = 5.

Answer from: Quest

answer : (a) volume of the gas = 8.67 × $10^{-3}$ l

(b) second virial coefficient b = -1.21226 l/mole

solution : given, t = 300k

p = 20atm

z = 0.86

n = 8.2 mmoles = 8.2 × $10^{-3}$ moles

r = 0.082 l atm/k/mol

find, (a) volume of gas and (b) second virial coefficient b at 300k.

formula used : $z=\frac{pv}{nrt}$

and $z=1+\frac{b}{v}$

(a) $z=\frac{pv}{nrt}$

$v=\frac{znrt}{p}$

= $\frac{0.86\times 8.2\times[tex]10^{-3}$ \times 0.082\times 300}{20}[/tex]

= 8.67 × $10^{-3}$ l

(b) $z=1+\frac{b}{v}$

$b=(z-1)v$

= (0.00867-1) × 8.659

= - 8.5839 l/mole

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