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lorasvet [3.4K]
2 years ago
6

A solution of 1.50 g of solute dissolved in 25.0 mL of H₂O at 25°C has a boiling point of 100.45°C. (d) Find the van’t Hoff fact

or (i) for this solution.
Chemistry
1 answer:
givi [52]2 years ago
4 0

The van 't Hoff factor is the ratio between the actual concentration of particles produced when the substance is dissolved and the concentration of a substance as calculated from its mass. For most non-electrolytes dissolved in water, the van 't Hoff factor is essentially 1.

<h3>What is the value of van 't Hoff factor?</h3>

For most non-electrolytes dissolved in water, the Van 't Hoff factor is essentially $ 1 $ . For most ionic compounds dissolved in water, the Van 't Hoff factor is equal to the number of discrete ions in a formula unit of the substance.

Which has highest Van t Hoff factor?

The Van't Hoff factor will be highest for

  A. Sodium chloride.

  B. Magnesium chloride.

  C. Sodium phosphate.

  D. Urea.

To learn more about van 't Hoff factor off factor here:

brainly.com/question/22047232

#SPJ4

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URGENT!! Chemistry gurus-- I summon thee!
Elina [12.6K]

1. Molarity : 0.25 M

2. mol CH₄ = 7.4 moles

mol O₂ = 14.8 moles

<h3>Further explanation</h3>

1.

Given

83.2 g CuCl2 in 2.5 liters of water

Required

the molarity

Solution

Molarity : mol solute per liter of solution(not per liter of solvent)

  • mol solute

mol solute = mol CuCl₂

mol CuCl₂ = mass : MW CuCl₂

mol CuCl₂ = 83.2 : 134.45

mol CuCl₂ = 0.619

  • Molarity

Molarity(M) = mol : V

Assume density CuCl₂ = 3.39 g/cm³

volume CuCl₂ = 8.32 g : 3.39 g/cm³ = 2.45 cm³=2.45 x 10⁻³ L

With this small volume value of CuCl₂, the volume of the solute is sometimes neglected in calculating molarity

volume of solution = 2.5 L + 2.45 x 10⁻³ L = 2.50245 L

Molarity(M) = mol : V

M = 0.619 : 2.50245 L = 0.247≈0.25

2.

Given

Reaction

The correct balanced reaction:

CH4 + 2O2 → CO2 + 2H2O

7.4 moles CO2

Required

moles of methane (CH4) and oxygen gas (O2)

Solution

From the equation, mol ratio of CO₂ : CH₄ : O₂ = 1 : 1 : 2

mol CH₄ = mol CO₂ = 7.4 moles

mol O₂ = 2 x mol CO₂ = 2 x 7.4 moles = 14.8 moles

3 0
3 years ago
What describes how computer programs convert design sketches into three dimensional images
weeeeeb [17]

Answer:

The programs take two-dimensional images and allow the user to manipulate cubes and prisms to create their design sketches.

Explanation:

Instead of working with squares and triangles, the programs allow the users to manipulate cubes and prisms to create their design sketches. Additionally, the programs can take two-dimensional pictures and convert them to possible three-dimensional images.

I got you bro :)

Sorry he took your points :(

- massmaster34

4 0
3 years ago
A student recorded the following while completing an experiment. Color of substance: yellow, shiny powder Effect of magnet: yell
victus00 [196]

Answer:

The answer is letter b, mixture.

Explanation:

Let's define what a mixture is at first.

Mixture- In Chemistry, mixture is a material made up of two or more different substances that are physically combined. The identities of the substances are retained. There are two types of mixture: <em>homogenous and heterogenous.</em>

<u>Homogenous mixture</u> examples: saline solution and air.

<u>Heterogenous mixture</u> examples: sand and oil and water.

The student's record shows the color of the substance as yellow, shiny powder. It could mean that the substance is a mixture of different kinds of powders. This is already a hint, since powder is a form of mixture. The record also shows that the substance is attracted to magnet. Part of the powder mixture contains something that is attracted to magnet. It could be an iron powder, which is the shiny one. The substance can then be classified as letter b, mixture.  

7 0
4 years ago
When a gas is heated, _______.
frez [133]

Answer:

B. Some of the absorbed energy is converted into potential energy, and some is converted into kinetic energy

Explanation:

7 0
4 years ago
A chemical equilibrium exists when: A chemical equilibrium exists when: there are equal amounts of reactants and products. the r
Airida [17]

Answer: A chemical equilibrium exists when the rate at which reactants form products is the same as the rate at which products form reactants.

Explanation:

When the concentration of both the reactants and products do not change with time then it means the chemical reaction has reached to a state of chemical equilibrium.

For example, CO(g) + Cl_{2}(g) \rightleftharpoons COCl_{2}(g)

Therefore, we can conclude that a chemical equilibrium exists when the rate at which reactants form products is the same as the rate at which products form reactants.

5 0
3 years ago
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