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3 years ago

Determine the number of atoms in 3.54 mol S.

Chemistry

1 answer:

mafiozo [28]3 years ago

7 0

D) 2.13 × 10^24

N = n × Na = 3.54 mol × 6.02 + 10^23 mol^-1 = 21.3 × 10^23 = 2.13 × 10^24

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Write a net ionic equation to show how quinoline, c9h7n, behaves as a base in water.

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Therefore the net ionic equation to show the basic nature of quinoline in water is,

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3 years ago

If 20.0 mL of glacial acetic acid (pure HC2H3O2HC2H3O2) is diluted to 1.70 L with water, what is the pH of the resulting solutio

Andreas93 [3]

Answer:

The answer to your question is pH = 0.686

Explanation:

Data

Acetic acid = 20 ml

Final volume = 1.7 L

pH = ?

density = 1.05 g/ml

Process

1.- Calculate the mass of acetic acid

density = mass / volume

mass = density x volume

mass = 1.05 x 20

mass = 21 g

2.- Calculate the moles of acetic acid (CH₃COOH)

Molar mass = (12 x 2) + (16 x 2) + (4 x 1)

= 24 + 32 + 4

= 60 g

60 g of acetic acid ---------------- 1 mol

21 g of acetic acid ----------------- x

x = (21 x 1) / 60

x = 0.35 moles

3.- Calculate the concentration

Molarity = 0.35 moles / 1.70 L

= 0.206

4.- Calculate the pH

pH = -log[0.206]

pH = 0.686

6 0

3 years ago