Kerala Board Solutions for Chapter: Gas Laws and Mole Concept, Exercise 2: Let us assess

Examine the data given in the table (Temperature and number of molecules of the gas are kept constant).

a) Calculate $\mathrm{P}\times \mathrm{V}$.

b) Which is the gas law related to this.

Analyse the situations given below and explain the gas law associated with it. 
a) A balloon is being inflated. 

b) When an inflated balloon is immersed in water, its size decreases.

Certain data regarding various gases kept under the same conditions of temperature and pressure are given below.

a) Complete the table.

b) Which gas law is applicable here?

How many grams of carbon and oxygen are required to get the same number of atoms as in one gram of Helium?

Examine the samples given.

a. $20 \mathrm{g} \mathrm{He}$           b. $44.8 \mathrm{L}$ of ${\mathrm{NH}}_3$ at STP

c. $67.2 \mathrm{L} {\mathrm{N}}_2$ at STP          d. $1$ mole of ${\mathrm{H}}_2{\mathrm{SO}}_4$        e. $180 \mathrm{g}$ of water.

i) Arrange the samples in the increasing order of the number of molecules in each. 
ii) What will be the ascending order of the number of atoms? 
iii) What will be the mass of samples b, c, and d? 

How many molecules are present in $90$ gram of water?

What will be the total number of atoms present in $90 \mathrm{g}$ of water?

What will be total number of electrons in the $90 \mathrm{g}$ of water?