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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":415,"_416":417,"_263":370,"_418":419,"_110":424},"w8EdmhbTVD6DHL6qnU0Tl5VMHhsv9n","q","Consider the reaction represented by the equation: 2NaHCO₃ → Na₂CO ₃ + H ₂O + CO ₂. What is the mass of sodium trioxocarbonate (lV) produced by the complete decomposition of 33.6 g of sodium hydrogen trioxocarbonate (IV)? [NaHCO₃ = 84, Na₂CO₃ = 106]","ans",[414],2,"2009","course","chemistry","opts",[420,421,422,423],"10.6 g","16.8 g","21.2 g","42.4 g",18,"18","initComment","initReply","actionData","errors"]

WAEC - Chemistry (2009 - No. 18)

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