SATHEE: Some Basic Concepts Of Chemistry Question 147

Some Basic Concepts Of Chemistry Question 147

Question: A gaseous compound is composed of 85.7% by mass of carbon and 14.3% by mass of hydrogen. Its density is 22.8 g/L at 350 K and 1.0 atm pressure. Calculate the molecular formula of compound.

Options:

A) $C_{5} H_{10}$

B) $C_{6} H_{12}$

C) $C_{4} H_{8}$

D) $C_{8} H_{18}$

Show Answer

Answer:

Correct Answer: C

Solution:

[c] $d = \frac{p M}{R T}$

$M = \frac{d R T}{p M} = \frac{2.28 \times 0.081 \times 300}{1} = 56.20, g/mol$ Ratio
$\Rightarrow$ $\frac{85.7}{12} : \frac{14.3}{1} = 1 : 2$ Empirical formula of compound $= {(C H_{2})}_{n}$

$n = \frac{56.20}{12 + 2} = 4$ Molecular formula $= [C H_{2}] \times 4 = C_{4} H_{8}$

Some Basic Concepts Of Chemistry Question 147

Question: A gaseous compound is composed of 85.7% by mass of carbon and 14.3% by mass of hydrogen. Its density is 22.8 g/L at 350 K and 1.0 atm pressure. Calculate the molecular formula of compound.

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

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Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

Some Basic Concepts Of Chemistry Question 147

Question: A gaseous compound is composed of 85.7% by mass of carbon and 14.3% by mass of hydrogen. Its density is 22.8 g/L at 350 K and 1.0 atm pressure. Calculate the molecular formula of compound.

Options:

Answer:

Solution:

Engineering Preparation

Medical Preparation

NCERT Books & Solutions

Important Resources

Other Resources

Syllabus

Test Platform

Sample Mock Test

Mentorship

NCERT Exercise Video Solution

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