Stoichiometry#Atomic Structure#Isotopes266Choose the best answerAn element has isotopes of 30 u (80%) and 40 u (20%). What is its relative atomic mass?A32B34C36D38 Like 0 Discuss 0Share
Stoichiometry#Isotopes#Stable Isotopes267Choose the best answerWhich element has the greatest number of stable naturally occurring isotopes among these?ACadmiumBPalladiumCTinDNickel Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry268Choose the best answerWhat volume of NH₃ at STP (273 K and 1 atm) is required to react completely with 49 g H₂SO₄? 2NH₃ + H₂SO₄ → (NH₄)₂SO₄A44.8 LB22.4 LC11.2 LD5.6 L Like 0 Discuss 0Share
StoichiometryBalancing Chemical Equations269Choose the best answerA chemical equation is balanced according to the law of:AMultiple proportionsBReciprocal proportionsCConservation of massDDefinite proportions Like 0 Discuss 0Share
StoichiometryMole Concept and Avogadro Constant270Choose the best answerWhich sample contains approximately 6.02 × 10²³ molecules?A1 g H₂B16 g CH₄C16 g O₂DAll of these Like 0 Discuss 0Share