Calculate the milli-equivalents of:
$(a) \, Ca(OH)_2$ in $74 \, g$
$(b) \, NaOH$ in $20 \, g$ respectively.

$3.011 \times 10^{22}$ atoms of an element weigh $1.15 \ g$. The atomic mass of the element is: (in $amu$)

The equivalent weight of a divalent metal is $31.82$. The weight of a single atom is

$5 \, mol$ of $AB_2$ weigh $125 \times 10^{-3} \, kg$ and $10 \, mol$ of $A_2B_2$ weigh $300 \times 10^{-3} \, kg$. The molar mass of $A$ $(M_A)$ and molar mass of $B$ $(M_B)$ in $kg \, mol^{-1}$ are:

Explain the concept of Average Atomic Mass.

Which instrument is used to measure the atomic mass of an atom accurately?