StoichiometryMass–Mole Conversion151Choose the best answerHow many moles of CO₂ are present in 220 mg CO₂?A5.0 × 10⁻³ molB5.0 × 10⁻² molC0.50 molD5.0 mol Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Molecules152Choose the best answerWhich sample contains the same number of molecules as 16 g O₂?A8 g O₂B16 g SO₂C32 g SO₂D64 g SO₂ Like 0 Discuss 0Share
StoichiometryMole Concept and Number of Ions153Choose the best answer55.5 g CaCl₂, with molar mass 111 g mol⁻¹, is completely dissolved in water. What is the total number of ions produced?ANAB1.5NAC2.5NAD3NA Like 0 Discuss 0Share
StoichiometryBalancing Chemical Equations154Choose the best answerWhen the equation: C₄H₈ + O₂ → CO₂ + H₂O is balanced with the coefficient of C₄H₈ equal to 1, the coefficient of O₂ is:A3B4C5D6 Like 0 Discuss 0Share
StoichiometryAvogadro's Law155Choose the best answerEqual 100 mL samples of O₂, NH₃ and CO₂ are taken at the same temperature and pressure. Their numbers of molecules are:ACO₂ < O₂ < NH₃BNH₃ < CO₂ < O₂CEqualDNH₃ = CO₂ < O₂ Like 0 Discuss 0Share