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IRISSAK [1]
2 years ago
5

In a mixture of hydrogen and nitrogen gases, the mole fraction of nitrogen is 0.333. If the partial pressure of hydrogen in the

mixture is 75.0 torr, what is the total pressure of the mixture
Chemistry
1 answer:
notka56 [123]2 years ago
4 0

Answer:

P_T=112.4torr

Explanation:

Hello there!

In this case, since these problems about gas mixtures are based off Dalton's law in terms of mole fraction, partial pressure and total pressure, we can write the following for hydrogen, we are given its partial pressure:

P_{H_2}=x_{H_2}*P_T

And can be solved for the total pressure as follows:

P_T=\frac{P_{H_2}}{x_{H_2}}

However, we first calculate the mole fraction of hydrogen by subtracting that of nitrogen to 1 due to:

x_{H_2}+x_{N_2}=1\\\\x_{H_2}=1-0.333=0.667

Then, we can plug in to obtain the total pressure:

P_T=\frac{75.0torr}{0.667}\\\\P_T=112.4torr

Regards!

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Answer:

The mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

Explanation:

We are given that

Aqueous solution that contains 22.9% NaOH by mass means

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Mass of NaOH(WB)=22.9 g

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Na=23

O=16

H=1.01

Molar mass of NaOH(MB)=23+16+1.01=40.01

Number of moles =\frac{Given\;mass}{Molar\;mass}

Using the formula

Number of moles of  NaOH(n_B)=\frac{W_B}{M_B}=\frac{22.9}{40.01}

n_B=0.572moles

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Number of moles of water(n_A)=\frac{77.1}{18.02}

n_A=4.279 moles

Now, mole fraction of NaOH

=\frac{n_B}{n_B+n_A}

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Hence, the mole fraction of NaOH in an aqueous solution that contain 22.9% NaOH by mass=0.882

4 0
3 years ago
How does the periodic table help in predicting the formula of a stable ionic compound?
marshall27 [118]
A. This is a FALSE statement because Metals in Group 1 form cations with a +1 charge and not -1. 

B. This is a TRUE statement. 

C. This is a FALSE statement because metals do not form anions i.e. negatively charged ions but form cations i.e. positively charged ions. 

D. This is a FALSE statement because metals do not form anions i.e. negatively charged ions but form cations i.e. positively charged ions. 
3 0
3 years ago
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Answer:

Average speed  = 68 mph

Explanation:

Given that,

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2 years ago
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Arisa [49]

Answer:

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The period of a sinusoidal graph is the time interval in which it repeats its pattern.

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8 0
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jolli1 [7]

Answer:

1.23x10^-6 mole

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A clear understanding of Avogadro's hypothesis proved that 1mole of any substance contains 6.02x10^23 atoms. This indicates that 1mole of Ag contains 6.02x10^23 atoms.

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4 0
3 years ago
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