Question

If 4.00 g of the unknown compound contained 0.133 mol of C and 0.267 mol of H. how many moles of oxygen, O

were in the sample?
Express your answer to three significant figures and include the

Answer 1

Step-by-step explanation:

convert to grams

0.133 mol C x 12 = 1.596

0.267 mol H x 1 = 0.267

Now subtract those numbers from the 4.00

4.00-1.596 -0.267 = 2.137 g O

Now convert grams O to moles

2.137 x (1mole O/16 g O) =0.1335625 moles O

3 sig figs = 0.134 moles O