Stoichiometry#Atomic Structure#Isotopes96Choose the best answerWhat is a mass spectrometer mainly used to determine?AAn instrument used to determine the chemical formula of compoundsBAn instrument used to separate atoms according to their colourCAn analytical instrument used to determine the relative isotopic masses and relative abundances of isotopesDAn instrument used to measure the density of elements Like 0 Discuss 0Share
StoichiometryMole Concept and Avogadro Constant97Choose the best answerOne mole of H₂O and one mole of CH₄ contain equal:AMassesBNumbers of moleculesCNumbers of atomsDNumbers of atoms per molecule Like 0 Discuss 0Share
StoichiometryMole Concept and Avogadro Constant98Choose the best answerOne mole of SO₂ contains:A4 gram-atoms of SO₂B6.022 × 10²³ sulfur atomsC1.81 × 10²³ SO₂ moleculesD6.02 × 10²³ oxygen atoms Like 0 Discuss 0Share
StoichiometryMole Concept and Avogadro Constant99Choose the best answerHow many molecules are present in 22 g CO₂?A6.022 × 10²³B3.011 × 10²³C6.023 × 10²¹D6.023 × 10²² Like 0 Discuss 0Share
StoichiometryMolar Volume at STP100Choose the best answerWhat volume at STP is occupied by 3.01 × 10²⁴ molecules of an ideal gas?A112 dm³B1.12 dm³C224 dm³D56 dm³ Like 0 Discuss 0Share