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suter [353]
3 years ago
5

PLEASE HELP

Chemistry
1 answer:
qaws [65]3 years ago
7 0

Answer:

I think my answer is correct

B)

2

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Water has a boiling point of 100°C.
SashulF [63]

Answer: higher,because when salt is dissolved bonds form between the salt ions and the water molecules

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What is the role of gravity in the solar system functions. Why don’t the planets fly off into space? Why don't the planets ram i
antiseptic1488 [7]

Explanation:

I haven't studied this in quite a long time but I will try my best to answer your question.

Gravity is a force that pulls things towards it and everything has gravity. The larger an object the stronger it's force of gravity and the more it pulls objects towards it. In our solar system the Sun is the largest object (by far) and therefore has the highest gravity. This means that the planets orbit the sun since the gravity of the sun is pulling the planets towards it. This stops planets from flying to outer space.

The thing that stops the planets from crashing into the sun is that they are travelling too fast. The planets are trying to travel in a straight direction, but the gravity and their speed in another direction kind of counteract and create a "medium" I guess you could call it, meaning the planet just orbits the sun.

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Which unit is not a measurement of volume?<br><br> cm<br> L<br> ml<br> cm3
Xelga [282]

Which unit is not a measurement of volume?

<u>cm </u>

L

ml

cm³

Cm is a measurement for length

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A bucket contains 15.0 L of seawater. The density of seawater is 1.027 g/mL.
Ad libitum [116K]
D=m/V
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6 0
3 years ago
Rank the following solutions from lowest to highest vapor pressure.
Fantom [35]

Solution :

When non volatile solute is added to solvent, vapor pressure gets lowered.

Relative lowering in vapor pressure is given :

$\frac{P^0-P}{P^0}$   = $\text{mole fraction}$ of solute

$\frac{P^0-P}{P^0}=x_B$

$P^0$ = vapor pressure of pure solvent

P = vapor pressure of solution

$x_B$ = mole fraction of solute

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

$n_B $ = $\text{number of moles of solute}$

$n_A$ = $\text{number of moles of solvent}$

Number of moles $=\frac{\text{weight}}{\text{molecular weight}}$

$\frac{P^0-P}{P^0}=\frac{w_B/M_B}{w_A/M_A+w_B/M_B}$

            $\approx \frac{w_B/M_B}{w_A/M_A}$

1. For 10 g of $CH_3COOK$

         $CH_3COOK \rightarrow CH_3COO^- + K^+$

  Ions = 2

It will affect colligative property.

$\frac{P^0-P}{P^0} = \frac{i \times 10/98}{w_A/M_A}$

Relative lowering in vapor pressure will be :

$=\frac{2 \times 10/98}{w_A/M_A}$

$=\frac{0.20}{w_A/M_A}$

2. For 20 g sucrose

Sucrose is non electrolyte, i = 1

$\frac{P^0-P}{P^0} = \frac{ 20/342}{w_A/M_A}$

            $=\frac{0.050}{w_A/M_A}$

3. For 20 g of glucose.

   Glucose is a non electrolyte, i = 1

   $\frac{P^0-P}{P^0} = \frac{20/180}{w_A/M_A}$

               $=\frac{0.11}{w_A/M_A}$

$w_A/M_A$ is same in all three solutions.

Hence, lowering in vapor pressure is maximum in $CH_3COOK$ and minimum is Sucrose.

Vapor pressure from lowest to highest.

10 g of $CH_3COOK$ < 20 g of glucose < 20 g of sucrose

               

6 0
3 years ago
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