StoichiometryMole#Mole Concept131Choose 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
StoichiometryMole#Mole Concept132Choose the best answerWhat is the mass of one gram-ion of OH⁻?A1 gB17C17 uD17 g Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules133Choose the best answerA sample of H₂ contains 3.01 × 10²³ molecules. What is its approximate mass?A2 gB1 gC0.5 gDNone of these Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules134Choose the best answerWhich sample contains the largest number of molecules?A32.0 g O₂B44.0 g CO₂C8.00 g H₂D56.0 g N₂ Like 0 Discuss 0Share
StoichiometryLimiting Reagent and Excess Reactant135Choose the best answer14 g N₂ reacts with 6 g H₂: N₂ + 3H₂ → 2NH₃ How much H₂ remains unreacted?A1.5 molB2.0 molC0.5 molD2/3 mol Like 0 Discuss 0Share