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A. The pH is 4.66

B. The pH is 3.44

C. The pOH is 11.54

Explanation:

A. Data obtained from the question include:

Hydrogen ion concentration, [H+] = 2.17x10^-5 M

pH =.?

pH is simply defined as the negative logarithm of the hydrogen ion concentration. Mathematically, it is expressed as:

pH = - log [H+]

With the above formula, we can calculate the pH of the solution as follow:

pH = - log [H+]

[H+] = 2.17x10^-5 M

pH = - log 2.17x10^-5

pH = 4.66

Therefore, the pH of the solution is 4.66.

B. Data obtained from the question include:

pOH = 10.56

pH =.?

The pH and the pOH of a solution are related with the following equation:

pH + pOH = 14

Thus, with the above equation, we can obtain the pH of the solution as illustrated below:

pH + pOH = 14

pOH = 10.56

pH + 10.56 = 14

Collect like terms

pH = 14 - 10.56

pH = 3.44

Therefore, the pH of the solution is 3.44.

C. The following data were obtained from the question:

Hydrogen ion concentration, [H+] = 3.48x10^-3 M

pOH =.?

First, we shall determine the hydroxide ion concentration, [OH-] in the solution.

This is illustrated below:

[H+] x [OH-] = 1x10^-14 M²

[H+] = 3.48x10^-3 M

3.48x10^-3 M X [OH-] = 1x10^-14 M²

Divide both side by 3.48x10^-3 M

[OH-] = 1x10^-14 M²/3.48x10^-3 M

[OH-] = 2.87x10^-12 M

Now, we can determine the pOH of the solution as follow:

pOH = - log [OH-]

[OH-] = 2.87x10^-12 M

pOH = - log 2.87x10^-12

pOH = 11.54.

Therefore, the pOH of the solution is 11.54.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

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