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2 years ago

Please help ASAP!!!

Chemistry

2 answers:

umka2103 [35]2 years ago

8 0

Particles are dissolved

Light beam passes through invisibly

Brownian movement is not discernible

I have gotten these answers checked and they are right.

NARA [144]2 years ago

3 0

Explanation:

A homogeneous mixture of two or more that two substances is known as a solution. Whereas a true solution is a solution in which solvent and solute molecules cannot be seen even with a microscope.

Properties of a true solution are as follows.

Particles are dissolved.
beam passes through invisibly .
Brownian movement is not discernible.

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A 1.00 L flask is filled with 1.10 g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pres

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Answer: a) Partial pressure of argon is 0.673 atm.

b) Partial pressure of ethane is 0.427 atm.

Explanation:

According to the ideal gas equation:'

$PV=nRT$

P = Pressure of the argon gas = ?

V= Volume of the gas = 1.00 L

T= Temperature of the gas = 25°C = 298 K (0°C = 273 K)

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{1.10g}{40g/mol}=0.0275moles$

$P=\frac{nRT}{V}=\frac{0.0275\times 0.0821\times 298}{1.00}=0.673atm$

Thus the partial pressure of argon is 0.673 atm.

b) According to Dalton's law, the total pressure is the sum of individual pressures.

$p_{total}=p_1+p_2$

$p_{total}=p_{Ar}+p_{ethane}$

$1.100=0.673+p_{ethane}$

$1.100-0.673=p_{ethane}$

$p_{ethane}=0.427atm$

Thus partial pressure of ethane is 0.427 atm.

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