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galben [10]
3 years ago
5

Part A

Chemistry
1 answer:
KonstantinChe [14]3 years ago
7 0

Answer:

The answer to your question is below

Explanation:

A.

[H₃O⁺] = 2 x 10⁻¹⁴ M

pH = ?

Formula

                                    pH = - log [H₃O⁺]

Substitution

                                    pH = - log [2 x 10⁻¹⁴]

Result

                                    pH = 13.7          

B.

[H₃O⁺] = ?

pH = 3.12

Formula

                                   pH = - log [H₃O⁺]

Substitution

                                   3.12 = - log [H₃O⁺]

                                   10^{-3.12} = [H_{3} O^{+}]

Result

                                  [H₃O⁺] = 7.59 M

   

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At STP how many molecules of nitrogen gas are in 224 L?
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Answer:

6.022×10²² molecules

Explanation:

Given data:

Volume of nitrogen = 224 L

Pressure = standard = 1 atm

Temperature = standard = 273 K

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Solution:

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1 atm × 224 L = n × 0.0821 atm.L/mol.K × 273 K

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n = 224 atm.L/22.41 atm.L/mol

n = 10 mol

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10 mol×6.022×10²³ molecules/ 1 mol

60.22×10²³ molecules

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