StoichiometryMass–Volume Stoichiometry1361Choose the best answerIn the reaction: 2Na + 2H₂O → 2NaOH + H₂ what volume of H₂ at STP (273 K and 1 atm) is produced by 23 g Na?A11.2 dm³B2.44 dm³C10.60 dm³D44.8 dm³ Like 0 Discuss 0Share
GasesCharles's Law1362Choose the best answerWhen a fixed amount of gas is heated at constant pressure, its volume:ADecreasesBRemains constantCFirst decreases and then increasesDIncreases Like 0 Discuss 0Share
GasesIdeal Gas Equation and Dimensions1363Choose the best answerThe product PV has the dimensions of:AForceBEntropyCWork or energyDTemperature Like 0 Discuss 0Share
Chemical BondingBond Polarity1364Choose the best answerHow many strongly polar covalent bonds are present in ethanol, C₂H₅OH?A1B2C3D4 Like 0 Discuss 0Share
Chemical BondingMolecular Geometry and Electron Domains1365Choose the best answerWhich pair has both the same molecular shape and the same number of electron domains around the central atom?ABeCl₂ and SnCl₂BSnCl₂ and SO₂CSO₂ and OF₂DOF₂ and BeCl₂ Like 0 Discuss 0Share