Question

Please help with the following..?

Answer 1

For any stoichiometry problem, you need to use the values in moles (this is already given in the question).

1. Balance the equation (already balanced)

2. Write a fraction (or ratio) of the coefficients and the moles of what the question is asking. For example, a) moles of \(CS_2\) and moles of \(C\).

\(\sf \dfrac{moles~of~C}{C's~coefficient}=\dfrac{moles~of~CS_2}{CS_2's~coefficient}\)

3. Solve for moles of what the question is asking, in this case moles of \(CS_2\).

\(\sf moles~of~CS_2=\dfrac{(moles~of~C)*(CS_2's~coefficient)}{C's~coefficient}\)

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Note that this is simple algebra: \(\dfrac{a}{b}=\dfrac{c}{d}\rightarrow a=\dfrac{b*c}{d} \)

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4. Plug in your numbers.

\(\sf moles~of~CS_2=\dfrac{(2.7~mol)*(1)}{5}=0.54 ~mol\)


b) through d) are solved in the same way.