Stoichiometry Stoichiometry MCQS#Atomic Structure#Isotopes21Choose the best answerWhich statement correctly links atomic mass in amu with isotopes?Aamu ignores isotopes.Bamu depends on only one isotope of each element.CAtomic mass in amu reflects the weighted contribution of all naturally occurring isotopes.Damu is calculated using only neutrons. Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept22Choose the best answerWhich statement correctly defines an element?AIt contains different types of atomsBIt cannot be broken into simpler substances by ordinary chemical meansCIt must always exist as moleculesDIt is always a metal Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Structure#Subatomic Particles23Choose the best answerAn atom has atomic number 35 and mass number 80. Which option gives its correct composition?A35 protons, 35 electrons, 45 neutronsB35 protons, 35 electrons, 80 neutronsC35 protons, 36 electrons, 45 neutronsD35 protons, 36 electrons, 80 neutrons Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Mole Concept24Choose the best answerHow many moles of atoms are present in 0.1 mol of a triatomic molecule?A0.1 mol atomsB0.3 mol atomsC3 mol atomsD1 mol atoms Like 0 Discuss 0Share1
Stoichiometry Stoichiometry MCQS#Mole Concept25Choose the best answerFor which substance are molecular mass and formula mass numerically the same?A56 amu CaCO₃B40 g MgOC17 amu NH₃DA and B Like 0 Discuss 0Share