How many moles of UF6 would have to be decomposed to provide enough fluorine to prepare 8.99 mol of CF4? (Assume sufficient carbon is available).

5.99 moles of

Explanation:

In this case, we can start with the decomposition of , so:

(Reaction 1)

The can react with carbon to produce :

(Reaction 2)

If we 8.99 mol of , we can calculate the moles of that we need. In reaction 2 we have a molar ratio of 1:2 (2 moles of will produce 1 mol of ):

With this value and using the molar ratio in reaction 1 (3 moles of are producing by each mol of ), so:

So, we will need 5.99 moles of to produce 8.99 mol of .

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