cnvjnfvkvkk cnvjnfvkvkk 17-12-2021 Chemistry contestada Guaifenesin (C1oH1404) is a common over-the-counter expectorant. What mass (in g) of oxygen is in 200. mg dose of Guaifenesin? (Molar mass of C10H1404 = 198.2 g·mol-1)