Write the Formulas for these ionic compounds: 11. Tin (IV) oxide
12. Chromium (III) oxide
13. Aluminum oxide
14. Zinc (II) Bromide
15. Silver sulfide
16.Magnesium chloride
17. Copper (II) Sulfate
18. Iron (III) phosphate
19. Potassium Carbonate
20. Lead (IV) hydroxide

Solved

Show answers

Ответ:

rosyjesus297

18.02.2022

Chemistry

The mass remains after 27.5 days is 8.043 mg.

Explanation:

Given that:

Half life = 14.3 days

$t_{1/2}=\frac{\ln2}{k}$

Where, k is rate constant

So,

$k=\frac{\ln2}{t_{1/2}}$

$k=\frac{\ln2}{14.3}\ days^{-1}$

The rate constant, k = 0.04847 days⁻¹

Time = 27.5 days

Using integrated rate law for first order kinetics as:

$[A_t]=[A_0]e^{-kt}$

Where,

[A_t] is the concentration at time t

[A_0] is the initial concentration = 30.5 mg

So,

$[A_t]=30.5\times e^{-0.04847\times 27.5}\ mg=8.043\ mg$

The mass remains after 27.5 days is 8.043 mg.

0,0(0 оценок)

Ask your question to the AI advisor

Ai-bot is an expert in any field and is the perfect companion for reliable and useful answers and advice on a variety of topics, including science, history, technology, art, sports, health, culture and more.

Ask your question

More tips

Answers on questions: Chemistry

Ask an AI advisor a question

I want advice

Write the Formulas for these ionic compounds: 11. Tin (IV) oxide 12. Chromium (III) oxide 13. Aluminum oxide 14. Zinc (II) Bromide 15. Silver sulfide 16.Magnesium chloride 17. Copper (II) Sulfate 18. Iron (III) phosphate 19. Potassium Carbonate 20. Lead (IV) hydroxide