SATHEE: Some Basic Concepts Of Chemistry Question 142

Some Basic Concepts Of Chemistry Question 142

Question: A self-contained breathing apparatus used $K O_{2}$ to convert $C O_{2}$ and $H_{2} O$ in exhaled air into oxygen and $K H C O_{3}$ as shown in the equation $K O_{2} + H_{2} O + C O_{2} \overset{,}{\to}, K H C O_{3} + O_{2}$ .

How many molecules of $O_{2 (g)}$ will be produced from the 0.044 g of $C O_{2 (g)}$ that is exhaled in a typical breath?

Options:

A) $6 \times 10^{20}$

B) $4.5 \times 10^{20}$

C) $2.25 \times 10^{21}$

D) $4.5 \times 10^{22}$

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Balanced reaction is $2 K O_{2} + H_{2} O + 2 C O_{2} \to 2 K H C O_{3} + \frac{3}{2} O_{2}$

$∴$ moles of $O_{2} = \frac{3}{4} \times \frac{0.044}{44}$

$\Rightarrow$ molecules $= \frac{3}{4} \times 10^{- 3} \times 6 \times 10^{23}$

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Some Basic Concepts Of Chemistry Question 142

Question: A self-contained breathing apparatus used KO2 to convert CO2 and H2O in exhaled air into oxygen and KHCO3 as shown in the equation KO2+H2O+CO2→,,KHCO3+O2 .

Options:

Answer:

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Question: A self-contained breathing apparatus used $K O_{2}$ to convert $C O_{2}$ and $H_{2} O$ in exhaled air into oxygen and $K H C O_{3}$ as shown in the equation $K O_{2} + H_{2} O + C O_{2} \overset{,}{\to}, K H C O_{3} + O_{2}$ .