Critical Thinking

Calculate the number of moles of methane required to produce $33 \mathrm{g}$ of carbon dioxide gas on its complete combustion.

$27 \mathrm{g}$ of $\mathrm{Al}$ (Atomic mass = $27$) will combine with __________ of ${\mathrm{O}}_2$ to form aluminium oxide.

The volume of ammonia at $\mathrm{NTP}$ obtained by the combination of $10 \mathrm{mL}$ of ${\mathrm{N}}_2$ and $30 \mathrm{mL}$ ${\mathrm{H}}_2$ is: 

What mass of $\mathrm{CaO}$ will be obtained by heating $3$ mole of ${\mathrm{CaCO}}_3$? $\left[\mathrm{Atomic} \mathrm{mass} \mathrm{of} \mathrm{Ca} = 40\right]$

$3\mathrm{g}$ of ${\mathrm{H}}_2$ reacts with $29 \mathrm{g}$ of ${\mathrm{O}}_2$ to yield water. The limiting reactant is______________ and the number of moles of ${\mathrm{H}}_2\mathrm{O}$ formed is ___________

Which of the following is a compound?

Two elements, $\mathrm{X}$ (Atomic mass $16$) and $\mathrm{Y}$ (Atomic mass $14$) combine to form compounds $\mathrm{A}, \mathrm{B}$and $\mathrm{C}$. The ratio of different masses of $\mathrm{Y}$ that combine with fixed mass of $\mathrm{X}$ in $\mathrm{A}, \mathrm{B} \text{and} \mathrm{C}$ is $1 : 3 : 5$. If $32$ parts by mass of $\mathrm{X}$combine with $84$ parts by mass of $\mathrm{Y}$ in $\mathrm{B}$, in $\mathrm{C}, 16$ parts by mass of$\mathrm{X}$ will combine with _______________

Which of the following is the value of $\mathrm{amu}$?