StoichiometryMolar Mass from Gas Volume186Choose the best answerA 4.4 g sample of a gas occupies 2.24 L at STP (273 K and 1 atm). Which gas may it be?ACO₂BCOCO₂DSO₂ Like 0 Discuss 0Share
StoichiometryMole#Mole Concept187Choose the best answerOne mole of carbon has a mass of 12 g, while one mole of magnesium has a mass of 24 g. One Mg atom is:AHalf as heavy as one C atomBEqual in mass to one C atomCTwice as heavy as one C atomDFour times as heavy as one C atom Like 0 Discuss 0Share
Stoichiometry#Relative Atomic Mass188Choose the best answerAn atom has an atomic mass of 35.5 u. What is its relative atomic mass?A35.5 amuB35.5 gC35.5DNone of these Like 0 Discuss 0Share
StoichiometryMole–Mass Stoichiometry189Choose the best answerWhat mass of MgO is produced when 0.5 mol Mg burns in excess O₂? 2Mg + O₂ → 2MgOA40 gB30 gC10 gD20 g Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms190Choose the best answerApproximately how many carbon atoms are present in 1 mol sucrose, C₁₂H₂₂O₁₁?A6 × 10²³B24 × 10²³C60 × 10²³D72 × 10²³ Like 0 Discuss 0Share