We’re being asked to determine the molecular formula of a compound composed of 88.14 % carbon and 11.86 % hydrogen by mass. This means we need to do the following steps:
Step 1: Calculate the mass and moles of C and H in the compound.
Step 2: Determine the lowest whole number ratio of C and H to get the empirical formula.
Step 3: Get the ratio of the molar mass and empirical mass to determine the molecular formula.
Step 1: The compound is composed of C and H and we’re given the mass percent of C (88.14% C) and H (11.86% H).
A compound isolated from the rind of lemons is found to be 88.14 % carbon and 11.86 % hydrogen by mass.
The molar mass is determined to be 136.26 g/mol. What is the molecular formula?
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What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Empirical Formula concept. You can view video lessons to learn Empirical Formula. Or if you need more Empirical Formula practice, you can also practice Empirical Formula practice problems.