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4 years ago

Once again if anyone could help, I would really appreciate your help! Thank you ❤️

Chemistry

1 answer:

Nikolay [14]4 years ago

6 0

Answer:

Explanation:

I explained how to do it on your other problem so look there :)

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find the empirical formula of the compound containing 11.3% of carbon, 43.4 % of sodium 45.3 % of oxygen

eduard

Answer:

CNa203

Explanation:

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3 years ago

In the wave-mechanical model, an orbital is a region of space in

Ilia_Sergeevich [38]

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3 years ago

How did atomists describe fire?

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3 years ago

The vapor pressure of pure water at 250C is 23.77 torr. What is the vapor pressure of water above a solution that is 1.500 m glu

Olegator [25]

Answer:

Vapor pressure of water = 23.14torr

Explanation:

When you made a solution, vapor pressure decreases following Raoult's law:

$P_{solution} = X_{solvent} P_{solvent}$

<em>Where P is vapor pressure and X mole fraction</em>

As vapor pressure of water is 23.77torr we must find the mole fraction of water knowing the solution is 1.500m glucose (That is 1.500 moles of glucose per kg of water = 1000g of water).

1000g of H₂O are, in moles (Molar mass: 18.02g/mol):

1000g H₂O ₓ (1mole / 18.02g) = 55.5 moles of H₂O.

As we know now the solution contains 55.5 moles of water and 1.5 moles of glucose. Thus, mole fraction of water (Solvent) is:

$X_{H_2O} = \frac{55.5molesH_2O}{55.5molesH_2O + 1.5 molesGlucose} = 0.9737$

Replacing in Raoult's law, pressure of water above the solution is:

$P_{solution} = X_{solvent} P_{solvent}$

$P_{solution} = 0.9737*23.77torr$

<h3>Vapor pressure of water = 23.14torr</h3>

7 0

3 years ago

Calculate the moles and grams of solute in each solution. D. 2.0 L of 0.30M Na2SO4. I already have A, B, and C. Thanks!

e-lub [12.9K]

Find the number of moles
C = n / V
C(Concentration) = 0.30 moles / L
V ( Volume) = 2 L
n = ??
n = C * V
n = 0.30 mol / L * 2 L
n = 0.60 mol

Find the molar mass
2Na = 23 * 2 = 46 grams
1S = 32 * 1 = 32 grams
O4 = 16 * 4 = 64 grams
Total = 142 grams / mol

Find the mass
n = given mass / molar mass
n = 0.06 mol
molar Mass = 142 grams / mol
given mass = ???

given mass = molar mass * mols
given mass = 142 * 0.6
given mass = 85.2 grams.

85.2 are in a 2 L solution that has a concentration of 0.6 mol/L

4 0

3 years ago

Read 2 more answers