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Kinetic Theory — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsKinetic Theory1 Mark
MCQ
What is the number of molecules in $2.24L$ of $SO_2$ at $\text{STP}\ ?$
  • A
    $6.023 \times 10^{23}$
  • ✓
    $6.023 \times 10^{22}$
  • C
    $6.023 \times 10^{20}$
  • D
    $6.023 \times 10^{21}$
✓

Answer

Correct option: B.
$6.023 \times 10^{22}$
According to Avogadro’s law $22.4L$ of any gas at $\text{STP}$ is $6.023 \times 10^{23}$.
So, in $2.24L$ there will be $\frac{6.023\times10^{23}}{10}$
$= 6.023 \times 10^{22}$​​​​​​​.

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