StoichiometryMass–Volume Stoichiometry2811Choose the best answerConsider the reaction: Ca + 2HCl → CaCl₂ + H₂ What volume of H₂ at STP (273 K and 1 atm) is produced when 20 g Ca reacts with excess HCl?A22.4 dm³B11.2 dm³C24.0 dm³D1.12 dm³ Like 0 Discuss 0Share
XiMDCAT XI Complete Chemistry Grand Test#Gas Density#Gases2812Choose the best answerAt which condition is the density of O₂ greatest?ASTPB273 K and 2 atmC546 K and 1 atmD546 K and 2 atm Like 0 Discuss 0Share
GasesMolar Mass from Ideal Gas Equation2813Choose the best answerWhich relations can be used to determine the molar mass M of an ideal gas?AM = mRT/PVBM = PV/mRTCM = dRT/PDBoth A and C Like 0 Discuss 0Share
Chemical BondingMolecular Orbital Theory and Bond Order2814Choose the best answerThe bond order of O₂ is:A0B1C2D3 Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms2815Choose the best answerHow many carbon atoms are present in 6 g C?A6NAB12NACNAD0.5NA Like 0 Discuss 0Share