Embibe Experts Solutions for Chapter: Stoichiometry (Mole Concept), Exercise 1: TS EAMCET Medical 2018 (02 May Shift-1)

How many moles of electrons weigh one $\mathrm{kg} ?$

$1 \mathrm{g}$ of an organic compound containing $\mathrm{C}$ and $\mathrm{H}$, on complete combustion produced $3.04 \mathrm{g}$ of ${\mathrm{CO}}_2$ and $1.53 \mathrm{g}$ of ${\mathrm{H}}_2\mathrm{O}$. Find the approximate percentage composition of $\mathrm{C}$ and $\mathrm{H}$ in the compound.

Among the following nitrogen compounds, which one has lowest percentage of nitrogen?

How many moles of ${\mathrm{O}}_2$ are evolved when one mole of ${\mathrm{MnO}}_4^{-}$ is reduced to ${\mathrm{Mn}}^{2+}$ by ${\mathrm{H}}_2{\mathrm{O}}_2$ in an acidic medium?

Conversion of molecular oxygen to ozone takes place only to the extent of $15\%$. Calculate the mass (in $\mathrm{g}$) of ozone that is formed from $67.2 \mathrm{L}$ of oxygen at $\mathrm{STP}$.

$20 \mathrm{g}$ of ${\mathrm{CaCO}}_3$ on heating produces $\mathrm{x}$ amount of ${\mathrm{CO}}_2.$ If the final weight of ${\mathrm{CaCO}}_3$ after the reaction is $5 \mathrm{g},$ the amount of ${\mathrm{CO}}_2$ liberated in $\mathrm{L}$ at $\mathrm{STP}$ is

Molality $\left(\mathrm{m}\right)$ of $18 \mathrm{M} {\mathrm{H}}_2{\mathrm{SO}}_4$ is, approximately [$\mathrm{d}=1.84 \mathrm{g} {\mathrm{cm}}^{-3}$, Molar mass of ${\mathrm{H}}_2{\mathrm{SO}}_4=98 \mathrm{g} {\mathrm{mol}}^{-1}$].

A fuel cell generates electricity by using methanol as fuel and ${\mathrm{O}}_2$ as the oxidant. Calculate the equivalent weight of methanol.