7 g of CO contains ____________________ O atoms Share with your friends Share 2 veena Vasandani answered this Moles of CO in 7g = mass of COmolar mass of CO = 728 = 0.25 mol Number of molecules of CO in 0.25 mol = 0.25 × 6.022 × 1023 molecules = 1.5055 × 1023 molecules I molecule of CO contains 1 atom of O So, atom of O in 7g of CO = 1.5055 × 1023 atoms. 1 View Full Answer