Stoichiometry Stoichiometry MCQS#Avogadro's Number26Choose the best answerHow many electrons are present in one mole of electrons?A1 electronB6.02 × 10²³ coulombsC6.02 × 10²³ electronsD1 gram of electrons Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Formula Mass27Choose the best answerWhy is the term molecular mass not used for NaCl?ANaCl has a very large mass.BNaCl exists only in the solid state.CNaCl does not exist as discrete molecules; it exists as a lattice of ions.DSodium is a metal. Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Molecules and Compounds28Choose the best answerWhich statement about molecules and compounds is incorrect?AA molecule may contain atoms of the same element.BAn element can exist as molecules.CAll molecules are compounds.DA compound always contains more than one element. Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept29Choose the best answerWhich sample contains the greatest number of molecules?A5 mol CH₄B10 mol N₂C15 mol COD20 mol N₂O Like 11 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Physical Changes30Choose the best answerWhich change can be reversed without forming a new substance?ABurning paperBMelting iceCRusting ironDCooking an egg Like 0 Discuss 0Share