CHEMISTRY MIDDLE SCHOOL

A reaction generates hydrogen gas (H) as a product. The re-actants are mixed and sealed in a 250.-mL vessel. After

20.0 minutes, 3.91 X 10-2 mol H, has been generated.

Calculate the average rate of the reaction.

Answers

Answer 1
Answer:

Answer: The average rate of the reaction is 7.82* 10^(-3)M/min

Explanation:

To calculate the molarity of hydrogen gas generated, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}

Moles of hydrogen gas = 3.91* 10^(-2)mol

Volume of solution = 250 mL = 0.250 L    (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

\text{Molarity of }H_2=(3.91* 10^(-2)mol)/(0.250L)=0.1564M

Average rate of the reaction is defined as the ratio of concentration of hydrogen generated to the time taken.

To calculate the average rate of the reaction, we use the equation:

\text{Average rate of the reaction}=\frac{\text{Concentration of hydrogen generated}}{\text{Time taken}}

We are given:

Concentration of hydrogen generated = 0.1564 M

Time taken = 20.0 minutes

Putting values in above equation, we get:

\text{Average rate of the reaction}=(0.1564M)/(20.0min)\n\n\text{Average rate of the reaction}=7.82* 10^(-3)M/min

Hence, the average rate of the reaction is 7.82* 10^(-3)M/min

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Answers

Answer:

B)3

Explanation:

I'm assuming the 2 is meant to be smaller. If it were a regular size 2 the answer would be 2 and that isn't an option
The answer is B. 3 because H2 plus H1 is 3 hydrogen

Example when materials are prepared as fluids so they can be moved more easily

Answers

A simple, albeit slightly less useful example perhaps, is when a foundry, or individual metalworker, liquefies metal such as iron, aluminum, or steel so that it can be mixed in with specific forging agents or transferred around a workplace. 

In general solids are easier to transport than liquids, but the above metal example is a valid one and the only other one that comes to mind is that of concrete. It is mixed as a liquid and transported as such, but then sprayed or laid down to dry and form a solid surface or filler.  
A simple, albeit slightly less useful example perhaps, is when a foundry, or individual metalworker, liquefies metal such as iron, aluminium, or steel so that it can be mixed in with specific forging agents or transferred around a workplace. 
In general, solids are easier to transport than liquids, but the above metal example is a valid one and the only other one that comes to mind is that of concrete. It is mixed as a liquid and transported as such, but then sprayed or laid down to dry and form a solid surface or filler.  
Explanation:

Both gases and liquids are fluids, therefore technically, the gas to liquid stuff does not work. 

In addition to the LN2 and LO2 the opposite guys mention, organic compound gases also are oftentimes created into liquids. LPG is of a composition that it liquefies at low pressures. LNG is gas that's terribly cold in order that it becomes a liquid in order that tons are shipped during a tanker. 

Industrial users additionally build solids into liquids for transport in pipelines. as an example, coal slurries area unit typically used. Coal is ground up into the mud, and mixed with water, and may then be pumped up through pipelines. There are different sorts of slurries, like wood chips/water in paper mills, sand/water mixture in dredging machines.

What are the elements in group 3 to 12 called?​

Answers

In groups 3-12 the elements are called Transition metals
The Transition Metals

Is vegetable soup a solution?

Answers

No it's not a proper solution to the world's problems
Well no it's not a solution to most problems.

1. The Moon completes one orbit around the Earth in approximately _______ and completes one cycle of its phases in approximately _______.






27 1/3 days, 24 hours





27 1/3 days, 29 1/2 days





365 1/4 days, 29 1/2 days





24 hours, 29 1/2 days


thank you for your time

Answers

The Moon completes one orbit around the Earth in approximately 27 1/3 days and completes one cycle of its phases in approximately 29 1/2 days. The correct option among all the options that are given in the question is the second option. I hope that this is the answer that has come to your great help.

100 Points!!!!!!!!Intermolecular distance is the distance between the particles that make up matter. The graph below compares the intermolecular distances in two substances. One substance is gas and the other is a liquid.

Which statement best describes the two substances?

Particles collide in liquids so Substance Y is a liquid.
Particles collide in gas so Substance X is a gas.
Particles move around in liquids so Substance X is a liquid.
Particles move around in gas so Substance Y is a gas.

Answers

Answer: Option (b) is the correct answer.

Explanation:

In liquids, the molecules are held by strong intermolecular forces of attraction as compared to gases. Due to which they are able to collide and slide past each other. Hence, they have a medium kinetic energy.

And, in liquid molecules there is moderate intermolecular distance between the particles.

In gases, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move very rapidly from one place to another leading to more number of collisions.  

Hence, gases are able to expand more rapidly as compared to liquids. Therefore, between the atoms of a  gas there are large intermolecular distances.

Therefore, we can conclude that the statement particles collide in gas so Substance X is a gas, best describes the two substances.

your answer is Particles collide in gas so Substance X is a gas.
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