Arun Syamal Solutions for Chapter: Atoms and Molecules, Exercise 2: EXERCISES

Avogadro's number is the number of electrons in $1$ gram-atom of an element.

Avogadro's number is the number of atoms in $1$ mole of an element.

The unit of relative molecular mass is gram.

$1$ gram-atom of an element means atoms present in $1$ gram of an element.

One mole is the short form of one molecule.

The formula of nickel($\mathrm{II}$) nitrate is $\mathrm{Ni}({\mathrm{NO}}_3{)}_{\mathrm{x}}$. The value of $\mathrm{x}$ is? (Give the answer in numeral)

Give the correct formula of zinc carbonate.

A. $\mathrm{ZnCO}$

B. ${\mathrm{ZnCO}}_3$

C. $\mathrm{Zn}{\left({\mathrm{CO}}_3\right)}_2$

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

The formula of aluminium sulphate is ${\mathrm{Al}}_2({\mathrm{SO}}_4{)}_{\mathrm{k}}$. Here, the value of $\mathrm{k}$ is