StoichiometryMass–Mass Stoichiometry291Choose the best answerWhat mass of CaCO₃ is required to produce 2.8 g CaO? CaCO₃ → CaO + CO₂A2.5 gB5.0 gC10 gD50 g Like 0 Discuss 0Share
BasicsStoichiometry #Mole Concept292Choose the best answerHow many moles of phosphorus atoms are present in 0.25 mol of P₄?A0.25 molB0.50 molC1.00 molD4.00 mol Like 0 Discuss 0Share
Stoichiometry 11#Physical and Chemical Changes293Choose the best answerWhich process represents only a physical change?ARusting of ironBCombustion of magnesium ribbonCBurning of candleDMelting of wax Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry294Choose the best answerOne gram of carbon is completely burnt in excess O₂: C + O₂ → CO₂ What volume of CO₂ is produced at STP (273 K and 1 atm)?A1 dm³B22.4 dm³C12 × 22.4 dm³D22.4/12 dm³ Like 0 Discuss 0Share
XiMDCAT XI Complete Chemistry Grand Test#Mole Concept#Stoichiometry295Choose the best answerWhich gas sample contains the same total number of atoms as 1 g of H₂?A22 g of CO₂B8 g of CH₄C20 g of NeD8 g of O₃ Like 0 Discuss 0Share