Chapter 6.4, Problem 6.11P

The tungsten metal used for filaments in light bulbs is made by reaction of tungsten(VI) oxide with hydrogen:

     ${\text{WO}}_3\left(s\right)+3{\text{H}}_2\left(g\right)\to \text{W}\left(s\right)+3{\text{H}}_2\text{O}\left(g\right)$

The above reaction was performed and produced 5.00 g of tungsten.

(a)    How many moles of tungsten were formed?

(b)    How many moles of tungsten(VI) oxide and hydrogen were required to produce the 5.00 g of tungsten?

(c)    How many grams of tungsten(VI) oxide, and how many grams of hydrogen must you start with to prepare 5.00 g of tungsten? (For WO₃, MW = 231.8 amu.)