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vesna_86 [32]
3 years ago
13

Purpose of hypothesis in experiment?

Chemistry
1 answer:
lutik1710 [3]3 years ago
3 0

Answer:

The purpose of a hypothesis is to find the answer to a question. A formalized hypothesis will force you to think about what results you should look for in an experiment.

Explanation:

Hope this is helpful to you!

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A gaseous system undergoes a change in temperature and volume. What is the entropy change for a particle in this system if the f
deff fn [24]

Explanation:

Entropy means the amount of randomness present within the molecules of the body of a substance.

Relation between entropy and microstate is as follows.

           S = K_{b} \times ln \Omega

where,      S = entropy

             K_{b} = Boltzmann constant

             \Omega = number of microstates

This equation only holds good when the system is neither losing or gaining energy. And, in the given situation we assume that the system is neither gaining or losing energy.

Also, let us assume that \Omega = 1, and \Omega' = 0.833

Therefore, change in entropy will be calculated as follows.

     \Delta S = K_{b} \times ln \Omega' - K_{b} \times ln \Omega

                 = 1.38 \times 10^{-23} \times ln(0.833) - 1.38 \times 10^{-23} \times \times ln(1)

                 = 1.38 \times 10^{-23} \times (-0.182)

                 = -0.251 \times 10^{-23}

or,             = -2.51 \times 10^{-24}

Thus, we can conclude that the entropy change for a particle in the given system is -2.51 \times 10^{-24} J/K particle.

8 0
3 years ago
Write a balanced chemical equation for the following reactions:
ivann1987 [24]
The balanced chemical equation for the following equation is:

Ca(OH)
2
​
+CO
2
​
⟶CaCO
3
​
+H
2
​
O
7 0
2 years ago
A lab technician needs a 40% solution of a certain chemical for an experiment, but the lab that she works in only has a 20% solu
Snezhnost [94]

To determine the volume of both concentration of the solution to make another concentration of solution, we need to set up two equations since we have two unknowns. <span>

For the first equation, we do a mass balance:

mass of 50% solution + mass of 20% solution = mass of 40% solution
M1 + M2 = M3

For the second equation, we do a component balance,</span>

<span>
M1(50%) + M2(20%) = M3(40%)
.50M1 + .20M2 = .40M3

To determine the ratio, we assume we have to make a 100 g of the 40% solution. So, the equation would change to</span>

<span>
</span>

<span>M1 + M2 = 100</span>

.50M1 + .20M2 = (100)(.40) = 40


Solving for M1 and M2,

M1 = 66.67 g

M2 = 33.33 g


So, the ratio of the 20% and the 50% would be approximately 33.33/66.67 = 0.5.

8 0
3 years ago
Which of the following is true about the speed of light? (2 points)<br><br> Group of answer choices
riadik2000 [5.3K]

Answer:

Speed of light is measured in vacuum and is equal to 671 million miles per hour, 1080 million kilometers per hour, 173 astronomical meters per second.

The exact value of speed of light is considered to total 299,792,458 meters per second

6 0
4 years ago
Read 2 more answers
Where does condensation occur?
Elanso [62]

Answer:

A. Atmosphere

Explanation:

hope this helps

8 0
3 years ago
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