CHEM 1211 Module Five Sample Exam Name:_____________
Part I Mole-Mole Stoichiometry 4 points
Tungsten occurs in the important mineral sheelite (Calcium tungstate), which is converted to tungstic acid. Tungsten is then extracted from tungstic acid by the following (unbalanced) reaction:
H2 + H2WO4 ---> W + H2O
How moles of hydrogen are needed to prepare 6 moles of elemental tungsten?
(You balance the equation!)
Ask The Question:
(1) Find the adverb:
...How moles of hydrogen...
____?_____mole H2
(2) Connect the Question to the Given:
____?__mole H2 = 6 mole W
Use the Concept Map to Connect the Units
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