Stoichiometry Stoichiometry MCQS#Avogadro Constant41Choose the best answerA mass of 1/N_A gram is approximately equal to which quantity?AThe mass of a protonBMolar massCOne atomic mass unit (u)DA and C Like 1 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Physical Change42Choose the best answerIdentify the physical change among the following.ARusting of ironBBurning magnesium ribbonCBurning a candleDMelting wax Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Structure#Atomic Theory43Choose the best answerWhich particle is the basic unit of an element and may or may not exist independently?AA moleculeBAn atomCAn ionDAn electron Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept44Choose the best answerWhich sample contains the greatest number of atoms?A1 mol N₂B1 mol COC1 mol N₂OD1 mol NaCl Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Structure#Isotopes45Choose the best answerWhy is the atomic mass of chlorine about 35.5 u?AIt has only one isotopeBIt exists as isotopes of Cl-35 and Cl-37CIt is found in equal proportionsDIt has an atomic number of 17 Like 0 Discuss 0Share