Embibe Experts Solutions for Chapter: Some Basic Concepts of Chemistry, Exercise 1: WBJEE 2019

What will be the mass of one atom of ${}^{12}\mathrm{C}$ ?

Which of the following has the largest number of atoms?

At S.T.P. the volume of $7.5 \mathrm{g}$ of a gas is $5.6 \mathrm{L}$. The gas is

How many moles of electrons will weigh one kilogram ?

In the crystalline solid $MS{O}_4·n{\mathrm{II}}_2\mathrm{O}$ of molar mass $250 \mathrm{g} {\mathrm{mol}}^{-1},$ the percentage of anhydrous salt is $64$ by weight. The value of $n$ is

A metal $\mathrm{M}$ (specific heat $0.16$ ) forms a metal chloride with $65\%$ chlorine present in it. The formula of the metal chloride will be

The mole fraction of ethanol in water is $0.08$. Its molality is