1. Tardigrade
  2. Question
  3. Chemistry
  4. Match the following physical quantities with their units and choose the correct codes from the options given below. Column I(Physical quantity) Column II(Unit) A Molarity 1 mol B Mole fraction 2 Unitless C Mole 3 mol L-1 D Molality 4 mol kg-1

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Q. Match the following physical quantities with their units and choose the correct codes from the options given below.
Column I(Physical quantity) Column II(Unit)
A Molarity 1 mol
B Mole fraction 2 Unitless
C Mole 3 $mol\,L^{-1}$
D Molality 4 $mol\,kg^{-1}$

Some Basic Concepts of Chemistry

Solution:

Mass of $1$ atom of ${ }^{12} C =\frac{\text { Atomic mass of } C }{\text { Avogadro's number}}$
$=\frac{12 g }{6.022 \times 10^{23}}$
$=1.9927 \times 10^{-23} g$