StoichiometryGas Density and Molar Mass91Choose the best answerWhich gas has a mass of approximately 1.16 g per litre at STP (273 K and 1 atm)?AO₂BCOCCH₄DC₂H₂ Like 0 Discuss 0Share
StoichiometryMole Concept and Avogadro Constant92Choose the best answerIf the number of entities defined as one mole were hypothetically changed from 6.02 × 10²³ to 6.02 × 10²⁰, which quantity would change?ADefinition of gramBMass associated with one mole of carbonCStoichiometric ratios in a balanced equationDRatio of elements in a compound Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry93Choose the best answerWhat volume of O₂ at STP (273 K and 1 atm) is required to burn 16 g sulfur, and what volume of SO₂ is produced? S + O₂ → SO₂A11.2 L and 22.4 LB22.4 L and 44.8 LC44.8 L and 22.4 LD11.2 L and 11.2 L Like 0 Discuss 0Share
UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Empirical and Molecular Formula#Stoichiometry94Choose the best answerA phosphorus oxide contains 43.6% oxygen by mass. What is its empirical formula?AP₂O₅BP₂O₃CP₃O₂DPO₂ Like 2 Discuss 0Share1
StoichiometryVolume Unit Conversion95Choose the best answer1 m³ is equal to:A10⁶ cm³B10³ cm³C10² cm³D10 cm³ Like 0 Discuss 0Share