Stoichiometry Stoichiometry MCQS#Atomic Structure#Isotopes26Choose the best answerA sample contains 51 atoms of bromine-79 and 49 atoms of bromine-81. What does this show?ASome bromine atoms are unstableBBromine has two different nucleon numbersCBromine has two different proton numbersDBromine-81 has 2 additional electrons than bromine-79 Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept27Choose the best answerHow many moles of Mg are present in 6 g of Mg? (Molar mass of Mg = 24 g mol⁻¹)A0.25 molB0.50 molC1.0 molD4.0 mol Like 23 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept28Choose the best answerWhich statement about one mole is correct?AOne mole of different substances always has the same massBOne mole is always equal to 22.4 L of any substanceCOne mole of any substance contains the same number of particlesDOne mole always contains 1 gram of substance Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Mass Unit29Choose the best answerIf an atom has a mass of 4 u, what does this mean?AIts mass is 4 g.BIt has 4 neutrons.CIts mass is four times the mass of 1 amu.DIt must be hydrogen. Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Avogadro's Law#Gases30Choose the best answerAt the same temperature and pressure, which sample occupies the greatest volume?A5 N_A molecules of H₂B10 N_A molecules of O₂C2.5 N_A molecules of CO₂D20 N_A molecules of N₂O Like 0 Discuss 0Share