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Oxana [17]
1 year ago
8

What is the pressure of 0.5 mol nitrogen (N2) gas in a 5.0 L container at 203 K?

Chemistry
1 answer:
Yuki888 [10]1 year ago
6 0

Answer:

The pressure of 0.5 mole of nitrogen gas=168.78 k pa

Given:

Moles of nitrogen gas=0.5mole

Volume of nitrogen gas=5L

Temperature of nitrogen gas=203K

To Find:

Pressure of 0.5g mole of nitrogen gas

<u>Step by Step by Explanation:</u>

Formula used for calculating the pressure of a gas is achieved through ideal gas equation

According to Ideal Gas;

P V=n R T

From this above equation, pressure can be calculated as

P=\frac{n R T}{V}

Where P=Pressure of the gas

N=number of moles=0.5moles

R=Gas constant=8.3144598 L k p_{a} k^{-1} m o l^{-1}

V=Volume of nitrogen gas in litres=5L

T=Temperature of nitrogen gas=203K

Substitute all the values in the above equation we get

P=\frac{0.5 \times 8.3144598 \times 203}{5}

P=\frac{843.9177}{5}

P=168.78 k pa

Result:

Thus the pressure of 0.5 mole of nitrogen gas is <u>168.78 k pa</u><u> </u>

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Answer:- 4.54*10^2^3 molecules.

Solution:- The grams of tetrabromomethane are given and it asks to calculate the number of molecules.

It is a two step unit conversion problem. In the first step, grams are converted to moles on dividing the grams by molar mass.

In second step, the moles are converted to molecules on multiplying by Avogadro number.

Molar mass of CBr_4  = 12+4(79.9)  = 331.6 g per mol

let's make the set up using dimensional analysis:

250g(\frac{1mol}{331.6g})(\frac{6.022*10^2^3molecules}{1mol})

= 4.54*10^2^3 molecules

So, there will be 4.54*10^2^3 molecules in 250 grams of CBr_4 .


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A sample of an unknown substance has a mass of 0.158 kg. If 2,510.0 J of heat is required to heat the substance from 32.0°C to 6
JulijaS [17]
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In this experiment, 0.170 g of caffeine is dissolved in 10.0 ml of water. the caffeine is extracted from the aqueous solution th
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solution:

Weight of caffeine is W = 0.170 gm.

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6 0
2 years ago
Which statements are true of the electron cloud model? Check all that apply. It is also known as the planetary model. It is cons
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edge 2020

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