Subject Experts Solutions for Chapter: Concept of Atomic, Molecular and Equivalent Masses, Exercise 1: Practice Exercise

The number of aluminium ions present in $54 \mathrm{g}$ of aluminium (atomic weight $=27$) is

Consider the following balanced chemical equation,

$2\mathrm{CO}+{\mathrm{O}}_2\rightleftharpoons 2{\mathrm{CO}}_2$

Which one of the following statements is significant in relation to the above chemical equation?

If the reaction of $1.0$ mole ${\mathrm{NH}}_{3\left(\mathrm{g}\right)}$ and $1.0$ mole ${\mathrm{O}}_{2\left(\mathrm{g}\right)}$

$4{\mathrm{NH}}_{3\left(\mathrm{g}\right)}+5{\mathrm{O}}_{2\left(\mathrm{g}\right)}⟶4{\mathrm{NO}}_{\left(\mathrm{g}\right)}+6{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{l}\right)}$ is carried to completion, then

How many grams of ${\mathrm{MgCO}}_3$ contain $24.00 \mathrm{g}$ of oxygen? (The molar mass of ${\mathrm{MgCO}}_3$ is $84.30 \mathrm{g} {\mathrm{mol}}^{-1}$)

Consider the following reaction:

${\mathrm{xAs}}_2{\mathrm{S}}_3+{\mathrm{yO}}_2⟶{\mathrm{zAs}}_2{\mathrm{O}}_3+{\mathrm{wSO}}_2$

What is $\mathrm{y}$ (the coefficient for ${\mathrm{O}}_2$), when this equation is balanced using whole number coefficients?

A compound ${\mathrm{X}}_2{\mathrm{O}}_3$ contains $31.58\%$ oxygen by weight. The atomic mass of $\mathrm{X}$ is ______.

What is the number of mole(s) of ${\mathrm{H}}_{2\left(\mathrm{g}\right)}$ required to saturate one mole of benzene?

Which one of the following has the different number of molecules? (All are kept at normal temperature and pressure)