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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",5,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"34Id4SvLrcS2fveoS7qXhM80WHbGKI","q","On recrystallization, 20g of magnesium tetraoxosuphate (IV) forms 41 g of magnesium tetraoxosulphate (IV) crystals, MgSO₄. yH₂O. The value of y is?
\n
\n(Mg = 24, S = 32, O = 16, H = 1)","ans",[414],3,"1997","course","chemistry","exp","MgSO₄. YH₂O
\n120g (MgSo₄) contains - 18g (water)
\n20g contain (41 - 20g) water.
\n120g → 18 y; 20 → 21
\n∴ 18 y = (126)/(18) = 7","opts",[422,423,424,425],"1","3","5","7",12,"12","initComment","initReply","actionData","errors"]

JAMB - Chemistry (1997 - No. 12)

Explanation

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