Question

A 1.00 sample of an organic compound containing c, h, and o is burned in the oxygen gas flow to produce 1.783 g co₂ and 0.734 g h₂o. what is the mass in grams of o in the sample?

Answer 1

To find the mass of oxygen in the sample, calculate the moles of carbon and hydrogen using the masses of CO₂ and H₂O. Then subtract the moles of carbon and hydrogen from the total moles in the sample to find the moles of oxygen.

Step-by-step explanation:

To determine the mass of oxygen in the sample, we need to calculate the mass of carbon and hydrogen using the given masses of CO₂ and H₂O.

First, we calculate the moles of CO₂ and H₂O using their molar masses (44 g/mol for CO₂ and 18 g/mol for H₂O).

Then, we use the ratio of carbon to CO₂ (1:1) to find the moles of carbon, and the ratio of hydrogen to H₂O (2:1) to find the moles of hydrogen.

Finally, we calculate the moles of oxygen by subtracting the moles of carbon and hydrogen from the total moles in the sample.