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Anuta_ua [19.1K]
3 years ago
13

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what woul

d happen to the pressure of the gas?
It would increase
It would be halved
It would stay the same
It would slightly decrease
Chemistry
2 answers:
bazaltina [42]3 years ago
8 0

To solve this we assume that the gas is an ideal gas. Then, we can use the ideal gas equation which is expressed as PV = nRT. At a constant temperature and number of moles of the gas the product of PV is equal to some constant. At another set of condition of temperature, the constant is still the same. Calculations are as follows:

 

P1V1 =P2V2

<span>P2 = P1V1/V2</span>

<span>
</span>

<span>The correct answer is the first option. Pressure would increase. This can be seen from the equation above where V2 is indirectly proportional to P2.</span>

alex41 [277]3 years ago
4 0

Answer:

It would increase.

Explanation:

If the gas is moving from a larger container to a small container, the volume of the gas will decrease because the gas molecules fulfill the volume of the container they are.

With no change at the temperature and the number of moles, the process can be studied by Boyle's equation:

P1*V1 = P2*V2

Where P is the pressure, V is the volume, 1 represents the first container, and 2 the second container.

We can observe that, if the volume decreases, the pressure must increase, so equality will be true. Pressure and volume are indirectly proportional.

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If the dosage for a medication is 225mg/lb, how many grams should a 25-lb child be given?
Oksanka [162]

Answer:

5.625 grams

Explanation:

Start your equation with what you have been given.  Place the units you need in your answer on the right side of the equal sign.

225mg

-----------   X  -----------   X ------------- =   ?   g

   lb

Now start to fill in your equation and use a conversions to get rid of the units you don't want.  Convert mg into grams first.  The child's weight (25 lb) is placed over 1 just to get the equation lined up properly so you can see how the units cancel out.

225 mg                 1 g                  25 lb            5.625 g

---------------   X   ---------------  X   -------------  =   ---------------

   lb                    1000 mg                 1                  1

The lb on the top and bottom cancel each other out and you are left with just grams.  Even though it is over one, that is the same at just 5.625 grams.

3 0
3 years ago
If you want to determine the actual salicylate concentration for a sample that gives a greater absorption than the highest conce
Anarel [89]

Answer: The concentration of unknown sample is 1.8 mg/ml

Explanation:

According to the dilution law,

M_1V_1=M_2V_2

where,  

M_1 = concentration of stock solution = ?

V_1 = volume of stock solution = 0.25 ml  

M_1 = concentration of diluted solution = 0.45 mg/ml

V_1 = volume of diluted solution = (0.25+0.75) ml = 1.00 ml

Putting in the values we get:

M_1\times 0.25=0.45\times 1.00

M_1=1.8mg/ml

Therefore, concentration of unknown sample is 1.8 mg/ml

3 0
3 years ago
A fatty acid with 10 carbons will be absorbed via the
VikaD [51]
Answer is: fatty acids of short (C4-C6) and medium (C8-C10) chain fatty acids (SCFAs and MCFAs) solubilize in intestinal fluids and are absorbed directly into the portal system.
Fatty acid with ten carbon atoms made medium chain triglycerides, that we also consume by food and get energy by breaking bonds between and oxidizing carbon atoms.
6 0
3 years ago
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Which term represents the stage when the cytoplasm of a cell divides?
taurus [48]

Answer:

Cytokinesis

Explanation:

This is the answer and I am killing time because the minimum is 20 characters...good day

4 0
3 years ago
How many joules of energy are necessary to heat a sample of water with a mass of 46.0 grams from 0.0 to 100.0
Luba_88 [7]

Answer:

Q = 19255.6 j

Explanation:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

Given data:

Mass of water = 46 g

change in temperature = ΔT = 100-0.0 = 100 °C

Heat absorbed by water = ?

Solution:

Specific heat capacity of water = 4.186 j/g. °C

Q = m.c. ΔT

Q = 46 g×4.186 j/g. °C×100 °C

Q = 19255.6 j

3 0
3 years ago
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