The Question is from NEET guide , and it was created by the author Mr. S M HUSSAIN

Question

The number of atoms in 0.1 mole of a triatomic gas is:

Mr. S M HUSSAIN · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
 **Primary Concept**: Mole concept and Avogadro's number
 **Related Topics**: Stoichiometry, atomic structure
 **Prerequisites**: Understanding of moles, Avogadro's number, and the concept of a triatomic molecule.
## SOLUTION PATHWAY
**Given Information**:
  Number of moles of gas = 0.1 mole
  The gas is triatomic (meaning each molecule contains 3 atoms)
**Method & Steps**:
 1. Find the number of molecules in 0.1 mole of the gas.
  Reasoning: 1 mole of any substance contains Avogadro's number ($N_A$) of particles.  Avogadro's number is approximately $6.022 	imes 10^{23}$ particles/mole.
  Formula/Rule: Number of molecules = Number of moles 	imes Avogadro's number
 2. Calculate the number of atoms.
  Working: Number of molecules = $0.1 	ext{ mole} 	imes 6.022 	imes 10^{23} 	ext{ molecules/mole} = 6.022 	imes 10^{22} 	ext{ molecules}$ 
        Since each molecule is triatomic, the number of atoms is 3 times the number of molecules.
        Number of atoms = $3 	imes 6.022 	imes 10^{22} = 1.806 	imes 10^{23} 	ext{ atoms}$ 
  Key Point:  Remember to multiply by 3 because the gas is triatomic.
 3. Final Answer
  Result: $1.806 	imes 10^{23}$ atoms
  Verification: The answer is in the correct order of magnitude and reflects the fact that 0.1 mole is a fraction of a mole, resulting in a number of atoms less than Avogadro's number.
 ## OPTION ANALYSIS
A :x: This is the number of molecules, not atoms, in 0.1 mole of the gas.
B ✓: This is the correct number of atoms in 0.1 mole of a triatomic gas.
C :x: This is Avogadro's number, representing the number of particles in 1 mole, not 0.1 mole of a triatomic gas.
D :x: This is 10 times the correct answer, which is the number of atoms in 1 mole of the triatomic gas.
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Forgetting to multiply by 3 for triatomic gas:  Remember that a triatomic gas has 3 atoms per molecule.
  2.Using Avogadro's number incorrectly: Ensure you understand that Avogadro's number gives the number of particles (atoms or molecules) in 1 mole.
 **Quick Tips**:
  1.Memorize Avogadro's number: $6.022 	imes 10^{23}$.
  2.Always check the units: Make sure your units cancel out correctly to get the desired units (atoms in this case).

Mr. S M HUSSAIN · Answer

$6.022 	imes 10^{22}$

Mr. S M HUSSAIN · Answer

The correct Option is "$1.806 	imes 10^{23}$"

Mr. S M HUSSAIN · Answer

$6.022 	imes 10^{23}$

Mr. S M HUSSAIN · Answer

$1.806 	imes 10^{24}$

NEET Questions

Select Subject

Question Tags

NEET Subjects

Our Bots

Company