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navik [9.2K]
2 years ago
15

Gasoline in a storage tank potential or kinetic?

Chemistry
2 answers:
cestrela7 [59]2 years ago
8 0
Potential because the gas is not yet in use or using energy
Xelga [282]2 years ago
7 0
Potential i believe.
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Practice question 1 How many moles are in 5.64e25 atoms of iron (Fe)?​
liberstina [14]

1 mole is equal to 6.0220 x 1023 atoms of any element.

6 0
2 years ago
A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company, Pharma-pill. As a research techni
torisob [31]

Answer:

a. pka = 3,73.

b. pkb = 10,27.

Explanation:

a. Supposing the chemical formula of X-281 is HX, the dissociation in water is:

HX + H₂O ⇄ H₃O⁺ + X⁻

Where ka is defined as:

ka = \frac{[H_3O^+][X^-]}{[HX]}

In equilibrium, molar concentrations are:

[HX] = 0,089M - x

[H₃O⁺] = x

[X⁻] = x

pH is defined as -log[H₃O⁺]], thus, [H₃O⁺] is:

[H_3O^+]} = 10^{-2,40}

[H₃O⁺] = <em>0,004M</em>

Thus:

[X⁻] = 0,004M

And:

[HX] = 0,089M - 0,004M = <em>0,085M</em>

ka = \frac{[0,004][0,004]}{[0,085]}

ka = 1,88x10⁻⁴

And <em>pka = 3,73</em>

b. As pka + pkb = 14,00

pkb = 14,00 - 3,73

<em>pkb = 10,27</em>

I hope it helps!

4 0
3 years ago
The pOH of a solution is 10.75. What is the concentration of OH– ions in the solution?
Lubov Fominskaja [6]
The correct answer is 1.778 x 10^-11M. Hope this helps.
4 0
3 years ago
Can some one tell me the best position in sex
masya89 [10]

Answer:

speedbump and magician

Explanation:

8 0
3 years ago
Match the symbol for each element with the name of the element. 1. hydrogen K 2. helium Mg 3. sodium He 4. magnesium H 5. potass
insens350 [35]

Answer:

1. hydrogen - H

2. helium - He

3. sodium - Na

4. magnesium - Mg

5. potassium - K

Explanation:

Hydrogen is the element of group 1 and first period. The atomic number of hydrogen is 1 and the symbol of the element is H.

The electronic configuration of the element hydrogen is:-

1s^1

Helium is the element of group 18 and first period. The atomic number of helium is 2 and the symbol of the element is He.

The electronic configuration of the element helium is:-

1s^2

Sodium is the element of group 1 and third period. The atomic number of sodium is 11 and the symbol of the element is Na.

The electronic configuration of the element sodium is:-

1s^22s^22p^63s^1

Magnesium is the element of group 2 and third period. The atomic number of magnesium is 12 and the symbol of the element is Mg.

The electronic configuration of the element magnesium is:-

1s^22s^22p^63s^2

Potassium is the element of group 1 and forth period. The atomic number of potassium is 19 and the symbol of the element is K.

The electronic configuration of the element potassium is:-

1s^22s^22p^63s^23p^64s^1

5 0
3 years ago
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