A fellow student does not understand why air is a mixture. Write a brief

A fellow student does not understand why air is a mixture. Write a brief explanation about why air is a mixture, whether it is homogeneous or heterogeneous, and how it can be separated.

2 months ago

Solution 1

Guest Guest #6877713
2 months ago
Air is a mixture because it consists of oxygen nitrogen and co2 it is therefore a homogenous mixture or solution and it can be seperated by a process know fractional distillation of liquid air. This is aprocess that converts air into a liquid form and then allows itto be portioned out

Solution 2

Guest Guest #6877714
2 months ago
Air is a mixture because it consists of many different molecules (e.g. oxygen, nitrogen) however these different molecules are not chemically bonded to each other, they are simply circulating in the same space altogether. Generally, the different gases can be separated from the mixture by cooling air to a temperature below zero (not sure quiet what, about 180 degrees I think) so that the mixture is liquid. The liquid mixture is then passed through into a fractionating tower and gradually heated up- this process is called fractional distillation, and essentially the different substances in the liquid air mixture are separated and collected off as they all boil off at separate boiling temperatures as the mixture is gradually heated.

Not quite sure what you mean by the homogeneous/ heterogeneous part, but I'm sure someone else will have the answer. Hope this somewhat helps!

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Sulfur is the element which can bond covalently with an oxygen atom to form a two-atom molecule.

What is element?

A chemical element is a material that cannot be degraded chemically. Although chemical processes do not modify atoms, nuclear reactions can produce new elements.

Elements are classified based on the number of protons they have. An element's atoms all have the same amount of protons, but differing numbers of electrons as well as neutrons. Ions are formed by altering the electron-to-proton ratio, whereas isotopes are formed by changing the amount of neutrons. Sulfur is the element which can bond covalently with an oxygen atom to form a two-atom molecule.

Therefore,  Sulfur is the element which can bond covalently with an oxygen atom to form a two-atom molecule.

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Solution 2

Answer:

A

Explanation:

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The correct answer is "They conduct an electric current in a solution. "

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Hello there.

Which statement describes a general property of bases?

They conduct an electric current in a solution.
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The volume of 53.0g of nitrogen dioxide gas at STP is 6.78 mol.

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n = ( 53g ) × 128.02mol/g

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If the pressure of the gas in a 2.31 L balloon is 0.12 ATM and the volume increases to 7.14 L what will be the final pressure of the air within the balloon? Assume the temperature remains constant
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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:

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Answer: 0.04 atm

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto \frac{1}{V}     (At constant temperature and number of moles)

P_1V_1=P_2V_2

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P_1 = initial pressure of gas = 0.12 atm

P_2 = final pressure of gas = ?

V_1 = initial volume of gas = 2.31 L

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P_2=0.04atm

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Solution 1

Answer:

Some of the physical changes used by the industrial chemist in order to identify it is by scratching it with other metals in order to find the hardness of it. Trying to deform it in order to find the malleability, and to heat it and measure the temperature in order to find the melting point.  

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Solution 2

Answer:

Some of the physical changes used by the industrial chemist in order to identify it is by scratching it with other metals in order to find the hardness of it. Trying to deform it in order to find the malleability, and to heat it and measure the temperature in order to find the melting point.  

Some of the chemical changes used by the industrial chemist in order to identify it is by inserting it in water to observe that whether it reacts with it or not, if the reaction is violent, then the metal belongs to either group I or group II. The other method is to insert it in acids of distinct strength and to observe its reaction. The metals belonging to the second group react briskly with acids. The other metals react gradually with acids and others are almost inert.

Explanation:

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Some of the symptoms from swallowing hydrochloric acid:


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