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m_a_m_a [10]
3 years ago
11

Calculate the pH of a solution in which [OH–] = 4.5 × 10–9M.

Chemistry
1 answer:
posledela3 years ago
7 0

Answer:

5.65 is the pH.

Explanation:

I am assuming that you are asking for confirmation on your answer. The answer is 5.65.

You would do:

[pOH] = -log[OH-]

          = -log[4.5*10^-9]

         equals about 8.3468

To find pH your would subtract the pOH from 14.

14-8.3468 = 5.65 << Rounded to match the answer choices.

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3 years ago
When using ion-selective electrodes, to compensate for a complex or unknown matrix, the _____________ method can be used to dete
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7 0
2 years ago
80 protons, 119 neutron
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4 0
2 years ago
Toluene, C7H8, is used in the manufacture of explosives such as TNT (trinitrotoluene). A 1.500 g sample of liquid toluene was pl
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Answer:

There were 63.67 kJ liberated

If 1 mol of toluene was burned, there would be liberated 3906 kJ / mole

Explanation:

Step 1: Data given

Mass of the toluene sample = 1.500 grams

The temperature of the calorimeter rose from 25.000 °C to 26.413 °C

<em>Write the balanced chemical equation for the reaction in the calorimeter.</em>

C7H8(l)  +  9O2(g) ⇒  7CO2(g) + 4H2O(l)

<u>Step 2:</u> Calculate Q of the calorimeter

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Q =<u> 63.67 kJ </u>

<u>Step 3:</u> Calculate moles of toluene

Moles toluene = mass toluene / molar mass toluene

Moles toluene = 1.500 grams /92.14 g/mol

Moles toluene = 0.0163 moles

<u>Step 4:</u>  Calculate energy per mole

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6 0
3 years ago
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tekilochka [14]
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7 0
3 years ago
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