Question

menthol, a compound containing c, h, and o, has a strong mint - like smell and is often found in cough drops. when a sample burns, 0.2829 g co₂ form. how many moles of carbon are in the sample? ? mol c this is not a final result. record at least six digits!

Explanation:

Step1: Find molar mass of \(CO_2\)

Molar mass of \(C\) is \(12.01\space g/mol\), molar mass of \(O\) is \(16.00\space g/mol\). For \(CO_2\), molar mass \(M = 12.01 + 2\times16.00 = 44.01\space g/mol\).

Step2: Calculate moles of \(CO_2\)

Moles of \(CO_2\), \(n_{CO_2}=\frac{mass}{molar\space mass}=\frac{0.2829\space g}{44.01\space g/mol}\approx0.00642808\space mol\).

Step3: Relate moles of \(CO_2\) to moles of \(C\)

In \(CO_2\), 1 mole of \(CO_2\) contains 1 mole of \(C\). So moles of \(C\), \(n_C = n_{CO_2}\approx0.00642808\space mol\).

Answer:

\(0.00642808\)