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3 years ago

The arrow in the photo represents a force.

Chemistry

2 answers:

elixir [45]3 years ago

8 0

Answer: D

Explanation: The arrow is pointing to the ground which means gravity is pushing the horse to the ground. But the opposite is the horse providing an equal and opposite force to the ground to make it balanced. The answer is D.

Hope it helps.

madam [21]3 years ago

6 0

Answer:b

Explanation:

i just know

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15. Calculate the hydrogen ion concentration of a

deff fn [24]

Answer:

Explanation:

pH = − log [H+] , we can solve for [H+] as,

− pH = log [H+] ,

[H+] = 10^−pH,

so PH =2.4 in you case is

[H+] = 10^-2.4 =0.00398

The option are not correct it looks

4 0

3 years ago

A dilute solution of bromine in carbon tetrachloride behaves as an ideal-dilute solution. The vapour pressure of pure CCl4 is 33

ANEK [815]

Explanation:

The given data is as follows.

Vapour pressure of pure $CCl_{4}$ = 33.85 Torr

Temperature = 298 K

Mole fraction of $Br_{2}$ = 122.36 torr

Therefore, calculate the vapor pressure of $Br_{2}$ as follows.

Vapour pressure of $Br_{2}$ = mole fraction of $Br_{2}$ x K of $Br_{2}$

= 0.050 x 122.36 Torr

= 6.118 Torr

So, vapor pressure of $Br_{2}$ is 6.118 Torr .

Now, calculate the vapor pressure of carbon tetrachloride as follows.

Vapour pressure of $CCl_{4}$ = mole fraction of $CCl_{4}$ x Pressure of $CCl_{4}$

= (1 - 0.050) × 33.85 Torr

= 32.1575 Torr

So, vapor pressure of $CCl_{4}$ is 32.1575 Torr .

Hence, the total pressure will be as follows.

= 6.118 Torr + 32.1575 Torr

= 38.2755 Torr

Therefore, composition of $CCl_{4}$ = $\frac{32.1575 Torr}{38.2755 Torr}$

= 0.8405

Composition of $CCl_{4}$ is 0.8405 .

And, composition of $Br_{2}$ = $\frac{6.118 Torr}{38.2755 Torr}$

= 0.1598

Composition of $Br_{2}$ is 0.1598 .

6 0

3 years ago

I WILL MARK BRAINLIEST!Which of the following statements is true?

PtichkaEL [24]

Answer:

B- fission breaks apart nuclei; fusion puts them back together

6 0

3 years ago

Read 2 more answers

______________ have properties of both metals and non metals.

stepan [7]

Answer:

gold

Explanation:

4 0

3 years ago

The heat required to change 1 gram of a solid at its normal melting point to a liquid at the same temperature is called the heat

Darya [45]

Answer:

Heat of fusion

Explanation:

The heat required to change 1 gram of a solid at its normal melting point to a liquid at the same temperature is called the heat of fusion.

The formula for the heat of fusion is given by :

$\Delta H=n\Delta H_{fus}$

Where

n is no of moles

$\Delta H_{fus}$ is molar heat of the substance

Hence, the correct answer is heat of fusion

8 0

2 years ago