What is a mole?

  • A
    $A$ unit of mass
  • B
    $A$ unit of volume
  • C
    $A$ unit of amount of substance
  • D
    $A$ unit of temperature

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The number of gram-molecules of $SO_2Cl_2$ in $13.5 \ g$ of sulfuryl chloride is .............

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One molecule of water has a volume of ........ $\times 10^{-23} \text{ cm}^3$? (Density of water = $1 \text{ g cm}^{-3}$)

Calculate the mass of oxygen present in $0.1 \ mol$ of $Na_2CO_3 \cdot 10H_2O$. (in $g$)

Which of the following relations is incorrect?

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