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These resources are designed to help you familiarize yourself with the exam format, identify key topics, and practice effectively. Whether you're preparing for the May/June or GCE sessions, our curated materials provide both objective and theory questions to enhance your study sessions.","tags","waec nigeria west africa examination council","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",10,"createdOn",1755991949910,"updatedOn","questionsCount",27220,"courseCount",23,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":414,"_415":416,"_263":370,"_417":418,"_110":423},"jIrR2hBFuI6sdsM6CT8y2yZneVPiBK","q","A solution of sodium trioxocarbonate (IV) contains 10.6g in 250cm³ of solution. Calculate the concentration of the solution. [Na₂CO₃ = 106.0]","ans",[95],"2010","course","chemistry","opts",[419,420,421,422],"0.4 mol dm^-3","1.0 mol dm^-3","10.6 mol dm^-3","25.0 mol dm^-3",12,"12","initComment","initReply","actionData","errors"]

WAEC - Chemistry (2010 - No. 12)

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