TEST YOUR SKILLS

The formula for Aluminium chloride can be-

A. ${\mathrm{AlCl}}_3$

B. ${\mathrm{Al}}_2{\mathrm{Cl}}_3$

C. $\mathrm{AlCl}$

"Enter your correct answer as A, B or C."

What is the atomicity of ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$?

What is the atomicity of $\mathrm{Ca}(\mathrm{OH}{)}_2$?

Find the molecular mass of ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}$. $\left(46 \mathrm{u} / 50 \mathrm{u}\right)$

The number of moles in $7 \mathrm{g}$ of $\mathrm{Na}$ is ______ moles. (Give your answer in three decimal places)

$\left(0.304/ 0.259\right)$

The mass of one atom of chlorine is _____$\times {10}^{-23}\mathrm{gms}$. Avogadro number is $6.023\times {10}^{23}$.

(Write the value with four significant figures)

Calculate the mass of one molecule of chlorine. (Give your answer in unified atomic mass unit) (Atomic weight of chlorine is $35.5 \mathrm{u}$)

Calculate the mass of one mole of chlorine gas in grams. ($17/ 35.5/ 71$)