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Mariulka [41]
4 years ago
14

Which of the following is represented in the highest percentage by volume in dry air?

Chemistry
1 answer:
Bogdan [553]4 years ago
8 0
Nitrogen is represented in the highest percentage by volume in dry air.
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If you dilute a solution what is the only thing about the solution that does NOT change?
lukranit [14]

Taking into account the definition of dilution, moles of solute (option C) is the only thing about the solution that does NOT change.

<h3>Dilution</h3>

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

  • Ci: initial concentration
  • Vi: initial volume
  • Cf: final concentration
  • Vf: final volume

<h3>Summary</h3>

In summary, moles of solute (option C) is the only thing about the solution that does NOT change.

Learn more about dilution:

brainly.com/question/6692004

brainly.com/question/16343005

brainly.com/question/24709069

#SPJ1

8 0
1 year ago
Is a flame test of an element a chemical or physical change?
myrzilka [38]
 it is a chemical change
8 0
3 years ago
Please help. it’s my last question.
ale4655 [162]
<h3>Further explanation </h3>

Given

Atomic symbol

Required

Atomic composition

Solution

Atomic number = number of protons = number of electrons

Mass Number (A) is the sum of protons and neutrons

Number of protons and Number of Neutrons  in nucleus

Number of electrons in the shell

From the picture:

protons = 3

neutrons = 4

electrons = 3

atomic number = protons = electrons = 3

mass number = protons + neutrons = 3+4 = 7

4 0
3 years ago
__________ electrons are the most important electrons to an atom.
Pie

Answer:

Valence electrons are the most important electrons to an atom.

Explanation:

They will determine many of the atoms traits since they are involved in bonding with other atoms.

7 0
4 years ago
Read 2 more answers
In the operation of the Heat Transfer Service Unit, one of the variables you can control is the rate of cooling water flowing ag
max2010maxim [7]

Answer:

A. The rate of heat transfer through the material would increase.

Explanation:

To calculate the heat transfer in a heat exchanger you decide that there is not heat leakage to the surroundings, that means that  magnitude of the two transfer rates will be equal. Any heat lost by the hot fluid, is gained by the cold fluid. The equation that describes this is Q = m×Cp×dT

Where:

heat = mass flow ×specific heat capacity × temperature difference

So if we increase the rate of flow of cooling water and the other variables that ypu can control remain the same, the result is that the rate of heat transfer through the material would increase, as it is stated in option a.

5 0
3 years ago
Read 2 more answers
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