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Zarrin [17]
4 years ago
12

Please help *chemistry*

Chemistry
1 answer:
Daniel [21]4 years ago
8 0
3 because I just did it
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Determine the pH of a 0.500 M HNO2 solution. Ka of HNO2 is 4.6 * 10-4.
Lostsunrise [7]

Answer: pH of solution is = 1.82

Explanation:

HNO_2\rightarrow H^+NO_2^-

 cM              0             0

c-c\alpha        c\alpha          c\alpha  

So dissociation constant will be:

K_a=\frac{(c\alpha)^{2}}{c-c\alpha}

Give c= 0.500 M and \alpha = ?

K_a=4.6\times 10^{-4}

Putting in the values we get:

4.6\times 10^{-4}=\frac{(0.500\times \alpha)^2}{(0.500-0.500\times \alpha)}

(\alpha)=0.030

[H^+]=c\times \alpha

[H^+]=0.500\times 0.030=0.015

Also pH=-log[H^+]

pH=-log[0.015]=1.82

Thus pH of a 0.500 M HNO_2 solution is 1.82

5 0
3 years ago
Please help me answer this I will be very grateful if so :)
dimaraw [331]

The molecules in system #2 have a higher kinetic energy because they are at a higher temperature than molecules in system#1.

<h3>Heating of water molecules</h3>

Temperature is defined as a measure of the average kinetic energy of the molecules of a body. The higher the temperature of a body, the higher the kinetic energy of the molecules of the body.

In both systems, we have water molecules that have the same formula H2O. However, the molecules in system #2 have a higher kinetic energy because they are at a higher temperature than molecules in system#1.

Learn more about kinetic energy of molecules: brainly.com/question/2731193

8 0
3 years ago
true or false: 1. An object can have only one type of energy at a time 2. If an object has energy, it must be moving. 3. All ene
gregori [183]
True is the correct answer
4 0
3 years ago
What is a mitochondria
lina2011 [118]

Answer:

Mitochondria are the structures within cells that produce energy.

Explanation:

Mitochondria are also like the human digestive system because the digestive system breaks down food to supply the body with energy like the mitochondria breaks down food to supply the cell with energy.

4 0
3 years ago
Read 2 more answers
Complete the following calculations regarding acid/base titrations
madam [21]

Based on the information provided and the assumption that the mole ratio of the acid to the base is 1:1, the molarity of the acid would be 0.0425 M

<h3>Acid/base Titration</h3>

Using the equation:

CaVa = CbVb

This is based on the assumption that the stoichiometric mole ratio of the acid to the base is 1:1.

Ca = CbVb/Va

                   0.1 x 25.5/60 = 0.0425 M

More on acid/base titration can be found here: brainly.com/question/2728613

6 0
3 years ago
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