Atomic StructureIsoelectronic Species881Choose the best answerWhich set consists of isoelectronic anions?AN³⁻, O²⁻, F⁻BN²⁻, O⁻, F⁻CN³⁻, O⁻, F⁻DN²⁻, O²⁻, F⁻ Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Mass Conversion882Choose the best answerA hydrogen atom has a mass of 1.008 u. What is its mass in kilograms?A1.008 × 1.661 × 10⁻²³ kgB1.008 × 1.661 × 10⁻²⁷ kgC1.008 ÷ 1.661 × 10⁻²⁷ kgD1.661 × 10⁻²⁷ kg Like 0 Discuss 0Share
XiMDCAT XI Complete Chemistry Grand Test#Percentage Yield#Stoichiometry883Choose the best answerA reaction has 80% yield and a theoretical yield of 50 g. What is the actual yield?A30 gB35 gC40 gD45 g Like 0 Discuss 0Share
GasesIdeal Behaviour of Helium884Choose the best answerHelium behaves very nearly as an ideal gas because:AIt has strong intermolecular attractionsBIts atoms have very large volumeCIt has a high boiling pointDIntermolecular attractions between He atoms are very weak Like 0 Discuss 0Share
GasesAverage Kinetic Energy of Gases885Choose the best answerAt 298 K, the average kinetic energy of a He atom compared with that of an H₂ molecule is:ATwice as largeBThe sameCHalf as largeDFour times as large Like 0 Discuss 0Share