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Nastasia [14]
3 years ago
8

A liquid has a pH of 6.8. Write the formula for calculating the [H+] and then determine the value of [H+], making sure to includ

e units with your answer.
Chemistry
1 answer:
lina2011 [118]3 years ago
4 0

Explanation:

Formula to calculate pH is as follows.

                    pH = -log[H^{+}]

It is given that pH is 6.8. Therefore, calculate the concentration of hydrogen ions as follows.

                    pH = -log[H^{+}]

                    6.8 = -log[H^{+}]

      [H^{+}] = antilog (-6.8)

                                 = 1.58 \times 10^{-7}  molarity

Thus, we can conclude that [H^{+}] is 1.58 \times 10^{-7} molarity.

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5 0
2 years ago
One gram of liquid benzene is burned in a bomb calorimeter. The temperature before ignition was 20.826 C, and the temperature af
Licemer1 [7]

Answer:

fH = - 3,255.7 kJ/mol

Explanation:

Because the bomb calorimeter is adiabatic (q =0), there'is no heat inside or outside it, so the heat flow from the combustion plus the heat flow of the system (bomb, water, and the contents) must be 0.

Qsystem + Qcombustion = 0

Qsystem = heat capacity*ΔT

10000*(25.000 - 20.826) + Qc = 0

Qcombustion = - 41,740 J = - 41.74 kJ

So, the enthaply of formation of benzene (fH) at 298.15 K (25.000 ºC) is the heat of the combustion, divided by the number of moles of it. The molar mass od benzene is: 6x12 g/mol of C + 6x1 g/mol of H = 78 g/mol, and:

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fH = -41.74/0.01282

fH = - 3,255.7 kJ/mol

4 0
3 years ago
Name the homologous series for this compound and show its structure<br>ch3ch2cc(ch2)2ch3​
kotykmax [81]

Answer:

Alkyne

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2 years ago
Question 2: you have two systems: 1) solid gold and water 2) solid sodium and waterWhich one can spontaneously release energy an
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Hey there!

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7 0
3 years ago
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If copper is heated with iron oxide there is no obvious reaction because

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On a reactivity chart, copper is far below iron. This makes it impossible for a replacement reaction to occur, so the equation doesn't change.

I hope I helped!

5 0
3 years ago
Read 2 more answers
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