Stoichiometry 11#Atomic Mass6Choose the best answerIf the atomic mass of element X is 8 u, which statement is correct?AOne atom of X has mass 8 g.BOne atom of X is 8 times heavier than 1 amu.COne mole of X has mass 8 amuDThe mass of one atom of X is 8 kg. Like 0 Discuss 0Share
Stoichiometry 11#Atomic Mass7Choose the best answerIf the molecular mass of X₂ is 50 u, what is the atomic mass of X?A100 uB25 uC50 uD12.5 u Like 0 Discuss 0Share
Stoichiometry 11#Mole Concept8Choose the best answerWhich sequence correctly represents atom → molecule → compound?AHe → O₂ → OBNa → H₂ → H₂OCO → O₂ → ODH → H₂O → H₂ Like 0 Discuss 0Share
Stoichiometry 11#Atomic Structure#Isotopes9Choose the best answerWhy is carbon-12 used as the standard for defining atomic mass unit?ABecause carbon is the lightest element.BBecause carbon is present in all compounds.CBecause carbon-12 is radioactive.DBecause carbon-12 is a stable and common isotope with a definite mass. Like 0 Discuss 0Share
Stoichiometry 11#Atom#Atomic Structure10Choose the best answerWhat is the smallest particle of an element that may or may not exist independently?AA moleculeBAn atomCAn ionDAn electron Like 0 Discuss 0Share