Fundamental Concepts of ChemistryPhysical Changes36Choose the best answerWhich is NOT a characteristic of a physical change?AFormation of a new substanceBChange may be reversibleCChemical composition remains unchangedDPhysical properties may change Like 0 Discuss 0Share
StoichiometryAvogadro's Law and Gas Volume37Choose the best answerWhat is the volume ratio of 4 g H₂ to 32 g CH₄ at the same temperature and pressure?A1 : 2B1 : 8C1 : 1D2 : 1 Like 0 Discuss 0Share
StoichiometryVolume Unit Conversion38Choose the best answer1 m³ is equal to:A10⁶ cm³B10³ cm³C10² cm³D10 cm³ Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Atoms39Choose the best answer0.5 mol H₂O contains how many moles of H atoms and O atoms, respectively?A1.0 mol H atoms and 0.5 mol O atomsB0.5 mol H atoms and 1.0 mol O atomsC1.0 mol H atoms and 1.0 mol O atomsD0.5 mol H atoms and 0.5 mol O atoms Like 0 Discuss 0Share
StoichiometryMass of an Element in a Compound40Choose the best answerHow many moles of NO₂ contain 16 g oxygen?A0.25 molB1.00 molC0.50 molD1.50 mol Like 0 Discuss 0Share