CHEMl 103l /l CHEM103l Finall Exam:l
(Latestl 2025/l 2026l Update)l Generall Chemistryl Il W/l Labl |l Questionsl &l Answers|l Gradel A|l 100%l Correctl (Verifiedl Solutions)-l Portagel Learning
Q:l Classifyl eachl ofl thel followingl asl al chemicall changel orl al physicall change
1.l Charcoall burns 2.l Mixingl cakel batterl withl water 3.l Bakingl thel batterl tol al cake
Answer:
1.l Charcoall burnsl -l burningl alwaysl =l chemicall change
2.l Mixingl cakel batterl withl waterl -l mixingl =l physicall change
3.l Bakingl thel batterl tol al cakel -l bakingl convertsl batterl tol newl materiall =l chemicall change
Q:l Showl thel fulll Nuclearl symboll includingl anyl +l orl -l chargel (n),l thel atomicl numberl (y),l thel massl numberl (x)l andl thel correctl elementl symboll (Z)l forl eachl elementl forl whichl thel protons,l neutronsl andl electronsl arel
shownl -l symboll shouldl appearl asl follows:l xZy+/-l n
31l protons,l 39l neutrons,l 28l electrons
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Answer:
31l protonsl =l Ga31,l 39l neutronsl =l 70Ga31,l 28l electronsl =l (+31l -l 28l =l +3)l =l 70Ga31+3
Q:l Namel eachl ofl thel followingl chemicall compounds.l Bel surel tol namel
alll acidsl asl acidsl (NOTl forl instancel asl binaryl compounds)
1.l PF5 2.l Al2(CO3)3 3.l H2CrO4
Answer:
1.l PF5l -l binaryl molecularl =l phosphorusl pentafluoride
2.l Al2(CO3)3l -l nonbinaryl ionicl =l aluminuml carbonate
3.l H2CrO4l -l nonbinaryl acidl =l chromicl acid
Q:l Writel thel formulal forl eachl ofl thel followingl chemicall compoundsl
explainingl thel answerl withl appropriatel chargesl and/orl prefixesl and/orl suffixes.
1.l Bromicl acid 2.l Dinitrogenl pentoxide 3.l Potassiuml carbonate
Answer:
1.l Bromicl acidl -l nonbinaryl acidl ofl Hl +l bromatel (BrO3-1)l =l HBrO3
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