1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
SashulF [63]
3 years ago
6

A dilute aqueous solution of an organic compound soluble in water is formed by dissolving 2.35 g of the compound in water to for

m 0.250 L of solution. The resulting solution has an osmotic pressure of 0.605 atm at25∘CAssuming that the organic compound is a nonelectrolyte, what is its molar mass?
Chemistry
1 answer:
Sliva [168]3 years ago
5 0

Answer:

  • The molar mass is 380. g/mol (three significant figures)

Explanation:

1) <em>Osmotic pressure</em> is a colligative property, which means that it depends on the number of particles of solute present in the solvent.

2) The mathematical expression that relates osmotic pressure with the <em>concentration of solute</em> is:

  • Π = i M R T

Where:

  • Π is the osmotic pressure,
  • i is the van't Hoff factor,
  • M is the molarity concentration of the solute,
  • R is the universal constant,
  • T is the temperature in kelvins.

3) Here:

  • i = 1, because the solute is a summed to be a nonelectrolyte,
  • T = 25 + 273.15 K = 293.15,
  • R = 0.08206 L atm mol⁻¹ K⁻¹,
  • Π = 0.605 atm

4) <u>Calculate M</u>

  • M = Π / ( i R T) =

             = 0.605 atm / (1 × 0.08206 L atm mol⁻¹ K⁻¹ × 298.15 K) =

             = 0.0247 atm (three significant figures)

5) <u>Calculate number of moles, from molarity definition</u>:

  • M = n / V (liters)

            ⇒ n = M × V (in liters) = 0.0247 M × 0.250 liter =

                    = 0.00618 moles

6) <u>Calculate molar mass</u>:

  • Molar mass = mass in grams / number of moles =

                             = 2.35 g / 0.00618 moles

                             = 380 g/mol ← answer

You might be interested in
Which is the reason that ionic compounds are brittle? The bonds between the anions and cations are weak and therefore easily bro
bearhunter [10]
Well ionic compounds are brittle because similar charges repel, which causes them to break usually occurring when a force is applied, like a hammer strike. 
8 1
2 years ago
The table shows the average distance between the molecules of a substance in the solid, liquid, and gaseous states.
Pavlova-9 [17]

Answer:

Y > X > Z

Explanation:

The intermoecular forces refer to forces that exist between molecules of a substance. They are the secondary bond forces that hold particles of a substance together in a particular state of matter.

The shorter the distance between molecules, the greater the magnitude of intermolecular force between the molecules.

The molecules of Y are at the shortest distance from each other hence they have the highest magnitude of intermolecular forces. Followed by X and lastly Z with the greatest distance between the largest intermolecular distance.

7 0
2 years ago
How much thermal energy does a cup of coffee have
Fantom [35]

Answer:

a lot that's why it's really hot

6 0
2 years ago
Read 2 more answers
Calculate the formula for the following hydrate composed of 76.9% CaSO3 and 23.1%H2O
artcher [175]
Assume there is 100g of the substance at first

5 0
3 years ago
Read 2 more answers
The value of Zeff for a valence electron in an atom of silicon is?
lutik1710 [3]

Zeff is the effective nuclear charge wherein, Z resembles the number of protons in the nucleus while S corresponds to the number of non-valence electrons.

Zeff = Z - S

Silicon has 14 protons; its electron configuration is [Ne] 3s2 3p2. Its non-valence electrons is in the n = 1 and n =2 shells. There are 2 electrons in n = 1 and 8 in n = 2, so there are a total of 10 non-valence electron.

<span><span>Z<span>eff</span></span>= 14−10= 4</span>

So, the answer is 4.
6 0
3 years ago
Other questions:
  • A student is curious about the Ksp value for NaCl. The student looks up the value om the appendix of his textbook but cannot fin
    15·1 answer
  • Can someone help me solve all of these problems? (Will give brainliest and a heart)
    8·1 answer
  • How did organic compounds get their name and how is the word related to its meaning?
    11·1 answer
  • Please answer correctly !!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!!!!
    15·1 answer
  • Can someone help me please
    6·2 answers
  • What is the molecular formula of a compound that molecular mass of 54 g/mol and an empirical formula of C₂H₃? C₂H₃, C₄H₆, C₆H₉,
    13·1 answer
  • What is pH - discuss the pH scale
    10·1 answer
  • Balance the following:<br> CsH12 +<br> 02<br> CO2+<br> |<br> H20
    9·1 answer
  • If the two copies of a gene for each feature are the same version and provide instructions for only one type of protein, they ar
    7·1 answer
  • What is the 3 planet
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!