StoichiometryMolar Volume at STP1416Choose the best answerAn 8 g sample of O₂ occupies what volume at STP (273 K and 1 atm)?A22.4 dm³B11.2 dm³C5.6 dm³D2.8 dm³ Like 0 Discuss 0Share
BasicsStoichiometry #Atom#Atomic Structure1417Choose the best answerWhat is the smallest unit of an element that retains its chemical properties?AAtomBMoleculeCCompoundDIon Like 0 Discuss 0Share
Fundamental Concepts of ChemistryChemical Changes1418Choose the best answerWhich is a characteristic of a chemical change?AFormation of one or more new substancesBNo energy change can occurCChemical composition remains unchangedDOnly the physical state changes Like 0 Discuss 0Share
Stoichiometry 11#Atomic Mass Comparison1419Choose the best answerElements A and B have atomic masses 10 u and 20 u. What is the atomic-mass ratio B:A?A1:2B2:1C1:1D4:1 Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules1420Choose the best answerA patient takes two spoons of glucose, C₆H₁₂O₆. Each spoon contains 4.5 g glucose. How many glucose molecules are taken?A6.02 × 10²²B3.01 × 10²²C1.505 × 10²²D3.01 × 10²³ Like 0 Discuss 0Share