StoichiometryMole Concept and Number of Particles131Choose the best answer0.25 mol CH₄ contains:A1.505 × 10²³ CH₄ moleculesB1.505 × 10²³ carbon atomsC6.02 × 10²³ hydrogen atomsDAll of these Like 0 Discuss 0Share
StoichiometryMolecular Mass132Choose the best answerWhich pair has the same molecular mass?ANO₂ and CO₂BCO(NH₂)₂ and CH₃COOHCC₂H₆ and C₃H₆DNone of these Like 0 Discuss 0Share
Stoichiometry#Atomic Structure#Isotopes133Choose the best answerWhy is the relative atomic mass of chlorine about 35.45 instead of exactly 35 or 37?AChlorine atoms lose mass during bondingBChlorine contains equal numbers of neutrons and protonsCChlorine exists naturally as isotopes with different abundancesDAtomic masses are always decimal values Like 0 Discuss 0Share
StoichiometryAvogadro's Law and Gas Volume134Choose the best answerWhat is the volume ratio of 4 g H₂ to 32 g CH₄ at the same temperature and pressure?A1 : 2B1 : 8C1 : 1D2 : 1 Like 0 Discuss 0Share
StoichiometryAvogadro Constant135Choose the best answerAvogadro constant is equal to the number of:AH₂ molecules in 1 g H₂BAtoms in 44 g CO₂CCO₂ molecules in 44 g CO₂DOxygen atoms in 44 g CO₂ Like 0 Discuss 0Share