Chapter 7.7, Problem 7.58PP

In the acetylene torch, acetylene gas $\left({\text{C}}_{\text{2}}{\text{H}}_{\text{2}}\right)$ burns in oxygen to produce carbon dioxide, water, and energy.
${\text{2C}}_{\text{2}}{\text{H}}_{\text{2}}\left(g\right)+{\text{ 5O}}_{\text{2}}\left(g\right)\stackrel{\Delta }{\to }{\text{4CO}}_2\left(g\right)+{\text{2H}}_{\text{2}}\text{O}\left(g\right)$

a. How many moles of ${\text{O}}_2$ are needed to react with 2.40 moles of ${\text{C}}_{\text{2}}{\text{H}}_{\text{2}}$ ?
b. How many moles of ${\text{CO}}_2$ are produced when 3.5 moles of ${\text{C}}_{\text{2}}{\text{H}}_{\text{2}}$ reacts?
c. How many moles of ${\text{C}}_{\text{2}}{\text{H}}_{\text{2}}$ are needed to produce 0.50 mole of ${\text{H}}_{\text{2}}\text{O}$ ?
d. How many moles of ${\text{CO}}_2$ are produced from 0.100 mole of ${\text{O}}_2$ ?