A ___ is the part of the solution that usually stats as a solid and dissolves in solvent ?

Setler [38]

Answer:- solution boiling point = 102.23 degree C (102 degree C with three sig figs).

Solution:- When a non volatile solute is added to a solvent then boiling point increases. Elevation in boiling point is directly proportional to the molality of the solution.

The equation is:

$\Delta T_b=i*k_b*m$

where, $\Delta T_b$ is the elevation in boiling point, i is the Van't hoff factor, $k_b$ is the molal elevation constant and m is the molality.

Value of i is 1 as ethylene glycol is a covalent molecule that does not break to give ions. $k_b$ for water is $\frac{0.512^0C}{m}$ .

We can calculate the molality from the given grams of ethylene glycol and liters of water as molality is moles of solute per kg of solvent.

Molar mass of ethylene glycol is 62 gram per mol and density of water is 1.00 kg per liter.

$2.50L(\frac{1kg}{1L})$

= 2.50 kg

Let's calculate the moles of ethylene glycol.

$675g(\frac{1mol}{62g})$

= 10.9 mol

molality of the solution = $\frac{10.9mol}{2.50kg}$

= 4.36m

Let's plug in the values in the equation we have on the top for elevation in boiling point.

$\Delta T_b=4.36m(\frac{0.512^0C}{m})$

= $2.23^0C$

Boiling point of pure water is 100 degree C. So, the boiling point of the solution = 100 + 2.23 = 102.23 degree C

(If we fix the three sig figs then it could be written as 102 degree C.)

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3 years ago

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Calculate the pH and fraction of dissociation (

ELEN [110]

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3 0

3 years ago

Enyzmes change the _______ of a reaction by making the reaction go ______

11111nata11111 [884]

Rate, fast :Maybe these are the answers.

6 0

3 years ago

Enzymes are essential to cells because they are responsible to either making or breaking other molecules the cells need. True or

8_murik_8 [283]

Answer:

True is the answer to this question

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3 years ago

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In 1838, botanist Matthias Schleiden, determined that all plants are composed of cells. In 1839, anatomist Theodor Schwann propo

Margarita [4]

Answer:

This question is incomplete; the complete part is:

A) All cell have a cell wall.

B) All cell arise from pre-existing cells.

C) All cell are capable of photosynthesis.

D) All cell can develop into any other type of cell.

The answer is B

Explanation:

The commonly known universal theory proposed in 1838 took the contribution from three remarkable scientists namely: botanist Matthias Schleiden, anatomist Theodor Schwann and biologist Rudolph Virchow. According to the question, Mathias discovered that all plants are made of cells, Schwann determined that all animals are made of cells while Virchow determined that all living things are composed of cells.

However, in addition to Virchow's discovery, he also discovered and proposed that "All cell arise from pre-existing cells", which till date forms part of the three components of the cell theory. The three parts are:

- Cell is the fundamental and basic unit of all living things.

- All living things are made up of one or more cells

- All cells arise from pre-existing cells

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3 years ago