A chemist isolated a cobalt oxide that yielded 0.575 g of cobalt and 0.152 g of…
CHEMISTRY · Multi-part · AP · Chemistry · Atomic Structure and Properties · Atomic Structure and Properties
Problem
A chemist isolated a cobalt oxide that yielded 0.575 g of cobalt and 0.152 g of oxygen after complete chemical separation of the elements. Atomic masses (g mol⁻¹): Co = 58.93, O = 16.00.
(a) Calculate the mass percent of cobalt and the mass percent of oxygen in the oxide. Include units and show work.
(b) If another sample of the same oxide has a mass of 8.45 g, determine the mass of oxygen contained in that sample.