Mole Concept

The number of oxygen atoms in $4.4\mathrm{\hspace{0.17em}}\mathrm{g}$ of ${\mathrm{CO}}_2$ is:

The number of oxygen atoms in $4.4$ gram of $\text{C}{\text{O}}_2$ is
(Given that atomic mass $\text{C}$ and $\text{O}$ are $\text{12}$ and $\text{16}$ $\text{g/mol}$ )

The number of atoms in $0.1$ moles of a triatomic gas is:

 $({\mathrm{N}}_{\mathrm{A}}=6.023\times {10}^{23}\text{}{\mathrm{mol}}^{-1})$

$1\hspace{0.17em}\mathrm{cc} {\mathrm{N}}_2\mathrm{O}\mathrm{\hspace{0.17em}}\mathrm{at}\mathrm{\hspace{0.17em}}\mathrm{NTP}$ contains:

Which has maximum number of molecules?

If $N_A$ is Avogadro’s number then number of valence electrons in 4.2 g of nitride ions  $(N^{\mathrm{}3-})is$

1 gm of charcoal adsorbs 100 mL 0.5 M ${\mathrm{CH}}_3\mathrm{COOH}$ to form a monolayer, and thereby the molarity of ${\mathrm{CH}}_3\mathrm{COOH}$ reduces to 0.49. The surface area of the charcoal adsorbed by each molecule of acetic acid. $\left(\text{Surface area of charcoal = 3.01}\times {\text{10}}^2{\text{ m}}^2/\text{gm, Molarity}=\frac{\text{Number of moles}}{\text{1000 mL}}\right)$ will be:

The number of molecules and moles in $2.8375$ litres of ${\mathrm{O}}_2$ at $\mathrm{STP}$ are respectively

Match List-I with List-II

Choose the correct answer from the options given below:

Which of the following have least mass ?

In which case is the number of molecules of water maximum?

$100 \mathrm{ml}$ of an aqueous solution contains $6.0\times {10}^{21}$ solute molecules. The solution is diluted to $1 \mathrm{lit}$. The number of solute molecules present in $10 \mathrm{ml}$ of the dilute solution is: