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beks73 [17]
2 years ago
13

A gas has a volume of 27. 5 L at 302 k and 1. 40 atm. How many moles are in the sample of gas?

Chemistry
1 answer:
e-lub [12.9K]2 years ago
8 0

There are  1.554 moles are in the sample of gas when a  gas has a volume of 27. 5 L at 302 K and 1. 40 atm.

Calculation,

The given question is solved by the using of ideal gas equation which is shown below.

PV = nRT                               .... ( i )

where , P is he pressure of the gas = 1. 40 atm

V is the volume occupied by the gas = 27.5 L

R is the universal gas constant = 0.082 L atm/K mol

T is the temperature =  302 K

n is he number of moles of the gas = ?

By putting the value of pressure  P , volume V , Universal gas constant and temperature T in the equation ( i ) we get the number of moles.

1. 40 atm × 27.5 L = n × 0.082 L atm/K mol×  302 K

n = 1. 40 atm × 27.5 L/0.082 L atm/K mol×  302 K = 1.554 mole

There are  1.554 moles are in the sample of gas

To learn more about moles

brainly.com/question/26416088

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Answer:

T_{final} =45.64C=final temperature

Explanation:

In the question specific heat of water is not given but we should know the value of that and it 4.18Jg∘C

Specific heat means how much heat is required to increase the temperature of 1 gram of substance that substance by 1∘C .

Equation between heat lost or gain and the change in temperature.

q=m⋅c⋅ΔT , where

q - the amount of heat

m - the mass of the sample

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put all the given value into this ,

q=m\times c \times  \Delta  T

\Delta T=\frac{q}{mc} =\frac{1962}{732 \times 4.18}

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T_{final} -T_{initial} =0.64C

T_{final} =45.64C=final temperature.

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Molecules undergo London dispersion forces:

C_{4}H_{10} is the molecule will undergo only London dispersion forces when interacting with other molecules of the same kind.

What are London dispersion forces?

  • A sort of force that interacts between atoms and molecules that is often electrically symmetric is referred to as a London dispersion force.
  • When viewed from the nucleus, their electron distribution is frequently symmetrical. This dispersion force, which is also known as a transient attractive force, is frequently observed when the locations of the electrons in two nearby atoms cause the atoms to temporarily form dipoles.
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  • The force at these molecules is known as the London dispersion force. In nonpolar molecules, the forces are weak, and partial charges must be induced so that they can bond. In polar molecules, partial charges caused by polarity result in a stronger link known as a dipole-dipole. The dipole-dipole is significantly stronger and known as a hydrogen bond if it is connected to a large electronegative atom (F, O, or N). Ionic force is the name for the attraction force at ionic substances.
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b: the compound is ionic because Na is a metal and the other part is covalent,

c: two compounds are possible: one is nonpolar and exhibits London dispersion force; the other is polar and exhibits dipole-dipole force; and

d: both compounds exhibit hydrogen bonds (H bonded to O, and H bonded to F).

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A. C_{4}H_{10}

B. NaC_{2}H_{3}O_{2}

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D. C_{2}H_{5}OH HF

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