All categories

2 years ago

Need help with this

Chemistry

1 answer:

Vesnalui [34]2 years ago

6 0

I ready is easy just read the passage the answer is right there if you just read

You might be interested in

The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in diethyl et

Alexxx [7]

Answer: The vapor pressure of solution is 459.17 mmHg

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$ .....(1)

For testosterone:

Given mass of testosterone = 7.752 g

Molar mass of testosterone = 288.4 g/mol

Putting values in equation 1, we get:

$\text{Moles of testosterone}=\frac{7.752g}{288.4g/mol}=0.027mol$

For diethyl ether:

Given mass of diethyl ether = 208.0 g

Molar mass of diethyl ether = 74.12 g/mol

Putting values in equation 1, we get:

$\text{Moles of diethyl ether}=\frac{208.0g}{74.12g/mol}=2.81mol$

Mole fraction of a substance is calculated by using the equation:

$\chi_A=\frac{n_A}{n_A+n_B}$

$\chi_{\text{testosterone}}=\frac{n_{\text{testosterone}}}{n_{\text{testosterone}}+n_{\text{diethyl ether}}}$

$\chi_{\text{testosterone}}=\frac{0.027}{0.027+2.81}\\\\\chi_{\text{testosterone}}=0.0095$

The formula for relative lowering of vapor pressure will be:

$\frac{p^o-p_s}{p^o}=i\times \chi_{\text{solute}}$

where,

$p^o$ = vapor pressure of solvent (diethyl ether) = 463.57 mmHg

$p^s$ = vapor pressure of the solution = ?

i = Van't Hoff factor = 1 (for non electrolytes)

$\chi_{\text{solute}}$ = mole fraction of solute (testosterone) = 0.0095

Putting values in above equation, we get:

$\frac{463.57-p^s}{463.57}=1\times 0.0095\\\\p^s=459.17mmHg$

Hence, the vapor pressure of solution is 459.17 mmHg

7 0

3 years ago

Gress.

MrRissso [65]

Answer:

true

Explanation:

the small car also has gravity making it heavy

8 0

3 years ago

A ____ is a large area of thick ice that moves slowly

slega [8]

A Glacier is a large area of thick ice that moves slowly

7 0

3 years ago

The half life of Uranium-238 is 4.5 billion years and the age of earth is 4.5 X 109 years. What fraction of Uranium-238 that was

marta [7]

The correct answer is 1/2

3 0

3 years ago

For the reaction given below, how many moles of nitrogen monoxide will form if we start with 2.0 moles of oxygen?

r-ruslan [8.4K]

<h3>Answer: 1.6 mol (option 5)</h3>

Explanation:

Mole Ratio of O₂ : NO

Based on the balanced equation, the mole ratio of O₂ : NO is 5 : 4

∴ for every mole of O₂ reacted, ⁴/₅ moles of NO is produced

Moles of NO

since the number of mol of O₂ = 2.0 mol

then moles of NO produced = 2.0 mol × ⁴/₅

= 1.6 mol

∴ the moles of nitrogen monoxide that will form if we start with 2.0 moles of oxygen is 1.6 mol (option 5).

7 0

3 years ago