Answer to Question #73541 in General Chemistry for Leah

Question

In an early experiment, a 2.514-g sample of calcium was heated in a stream of pure oxygen, and was found to increase in mass by 1.004-g. Calculate the empirical formula of calcium oxide.

Answer 1

Solution:
Amount of calcium in the sample: 2.514 / 40.08 = 0.0627 mol
Amount of oxygen reacted: 1.004 / 16.00 = 0.0627 mol
Ratio of elements: 0.0627 : 0.0627 = 1 : 1
Answer:
CaO