The ratio of the mass percentages of & and & of a saturated acyclic organic compound are and respectively. Then, the number of moles of oxygen gas required for complete combustion of two moles

Question

The ratio of the mass percentages of  &  and  &  of a saturated acyclic organic compound  are  and  respectively. Then, the number of moles of oxygen gas required for complete combustion of two moles of organic compound  is .

Canvas Classes · Accepted Answer

Strategy:
 First, determine the atomic ratio of C, H, and O from their mass percentages to find the empirical formula. Then, identify the molecular formula and balance its combustion equation to calculate the oxygen requirement for 2 moles.

Step 1: Determine the formula
 and .
This gives an empirical formula . For a saturated acyclic compound, this corresponds to ethylene glycol, .

Step 2: Calculate Oxygen demand
Combustion: .
For 2 moles of compound,  moles of Oxygen are required.

More questions from Some Basic Concepts of Chemistry (Mole Concept)