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4 years ago

Which of the following actions will lead to a decrease in pressure?

Chemistry

2 answers:

Alex Ar [27]4 years ago

6 0

The action that would most likely lead to. Decrease in volume is decrease in temperature.

tekilochka [14]4 years ago

6 0

<u>Answer:</u> The correct answer is decreasing temperature.

<u>Explanation:</u>

The relation between pressure, temperature, volume and number of moles of gas is given by the equal known as ideal gas equation:

$PV=nRT$

or,

$P=\frac{nRT}{V}$

where,

P = Pressure of the gas

V = Volume of the gas

n = Number of moles of gas

R = Gas constant

T = Temperature of gas

From the above relation, it is visible that pressure is directly related to number of moles and temperature of the gas. So, if pressure decreases, the number of moles and temperature of the gas also decreases.

Also, pressure is inversely related to volume of the gas. So, if pressure gets decreased, the volume of the gas must increase.

And, pressure is directly related to number of collisions of the particles. Thus, if the pressure decreases, this means that number of collisions between the particles must also decrease.

Hence, the correct answer is decreasing temperature.

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Calculate the boiling point (in degrees C) of a solution made by dissolving 7 g of naphthalene {C10H8} in 14.4 g of benzene. The

never [62]

Answer:

The boiling point = 89.69 °C

Explanation:

Step 1: Data given

Mass of naphthalane = 7.0 grams

Mass of benzene = 14.4 grams

The Kbp of the solvent = 2.53 K/m

The normal boiling point is 80.1°C

Naphthalene, C10H8 , is a non-electrolyte, which means that the van't Hoff factor for this solution will be 1

Step 2: Calculate moles naphthalene

Moles naphthalene = mass / molar mass

Moles naphthalene = 7.0 grams / 128.17 g/mol

Moles naphthalene = 0.0546 moles

Step 3: Calculate molality

Molality = moles naphthalene / mass water

Molality = 0.0546 moles / 0.0144 kg

Molality = 3.79 molal

Step 4:

ΔT = i*Kb*m

ΔT = 1*2.53 K/m * 3.79 molal

ΔT = 9.59 °C

The boiling point = 80.1 °C + 9.59 °C = 89.69 °C

3 0

3 years ago

What is the electron configuration of an element with atomic number 15? A. 1s2 2s2 2p6 B. 1s2 2s2 2p6 3s2 3p5 C. 1s2 2s2 2p6 3s2

kipiarov [429]

B
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4 0

3 years ago

Read 2 more answers

How is reusable water bottles are more environmentally friendly than one use water bottle?

dexar [7]

Answer:

They are better because they are more usable than Plastic and reusable water bottles are better for the planet!

Explanation:

6 0

3 years ago

A person suspects that an unknown liquid is water. he adds 110.0 J of heat to 55.0 g of liquid. The temperature of the liquid in

Tema [17]

Explanation:

First thing first, you mistyped the specific heat of water, which should be

water

4.18

∘

Now, a substance's specific heat tells you how much heat is required to increase the temperature of

1 g

of that substance by

∘

In the case of water, you would need

4.18 J

to increase the temperature of

1 g

of water by

∘

Notice that your sample of water has a mass of

1 g

as well, which means that the only factor that will determine the amount of heat needed will be the difference in temperature.

The equation that establishes a relationshop between heat and change in temperature looks like this

⋅

, where

- heat absorbed

- the specific heat of the substance, in your case of water

- the change in temperature, defined as the difference between the final temperature and the initial temperature

Plug in your values and solve for

to get

1.00

⋅

4.18

⋅

∘

⋅

(

83.7

−

26.5

)

∘

239.096 J

Rounded to three sig figs, the answer will be

239 J

5 0

3 years ago

Where exactly is our solar system is this water found?

DaniilM [7]

Answer:

According to the scientists, evidence of an underground ocean suggests that Enceladus is one of the most likely places in the solar system to "host microbial life". Emissions of water vapor have been detected from several regions of the dwarf planet Ceres.

Explanation:

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3 years ago