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grandymaker [24]
3 years ago
9

The Second Law of Thermodynamics assures us that:

Chemistry
1 answer:
user100 [1]3 years ago
8 0
Electrons should orbit indefintely because an electron cannot collide with a nucleas it has never happen as well as it is predicted to never happen
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A sample of gas has a density of 0.53 g/L at 225 K and under a pressure of 108.8 kPa. Find the density of the gas at 345 K under
sukhopar [10]

Answer:

\rho _2=0.22g/L

Explanation:

Hello!

In this case, since we are considering an gas, which can be considered as idea, we can write the ideal gas equation in order to write it in terms of density rather than moles and volume:

PV=nRT\\\\PV=\frac{m}{MM} RT\\\\P*MM=\frac{m}{V} RT\\\\P*MM=\rho RT

Whereas MM is the molar mass of the gas. Now, since we can identify the initial and final states, we can cancel out R and MM since they remain the same:

\frac{P_1*MM}{P_2*MM} =\frac{\rho _1RT_1}{\rho _2RT_2} \\\\\frac{P_1}{P_2} =\frac{\rho _1T_1}{\rho _2T_2}

It means we can compute the final density as shown below:

\rho _2=\frac{\rho _1T_1P_2}{P_1T_2}

Now, we plug in to obtain:

\rho _2=\frac{0.53g/L*225K*68.3kPa}{345K*108.8kPa}\\\\\rho _2=0.22g/L

Regards!

8 0
2 years ago
What are the basic properties of the outer shell of an element?
crimeas [40]

The number of electrons in the outermost shell of an atom determines its physical and chemical properties. All elements are most stable with 8 electrons (an octet) in their outer shell.

Hope this helps!!

7 0
3 years ago
Which type of river is similar to a mature river, but flows more slowly so has less power to change the landscape? Select one: a
Ede4ka [16]

Answer:

The correct option is;

C. Old Age River

Explanation:

Among the three stages of  the development of a river, which are the youthful, mature, and old age stages, the old age river is least dynamic

The water is very slow moving  with a low gradient and lesser erosive power to alter the landscape which results in the appearance of flood planes

Examples of old age rivers include, lower Ganges, lower Nile, Indus, and Yellow rivers

Old age rivers are characterized by a broad shape, with a wide flood plane, a very gentle gradient and the water current is low.

5 0
3 years ago
Imagine that A and B are cations and X, Y, and Z are anions, and that the following reactions occur:
Darina [25.2K]

Answer: AZ is the insoluble choice.

Explanation:

Z is an anion of a weak electronegative element. Hence, it bounds lightly with the highly electropositive cation A to form AZ.

AZ is not as ionic as AX, AY, BX, BY and BZ, so it is insoluble in water and yields precipitate on reaction with the salt of a weaker metal.

7 0
2 years ago
The time needed for a radioactive sample to decay to one-half of its original activity is called the ________.
belka [17]
The half life is the time needed.
3 0
3 years ago
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