All Module 1 to 6 Exams and Final Exam Portage Learning CHEM 104 Compiled questions with complete solution||2025

Portage.Learning./.CHEM.104./.Module.1.to.6.Exams




MODULE.1.EXAM

Click.this.link.to.access.the.Periodic.Table..This.may.be.helpful.throughout.the.
exam.
1. Convert. 845.3. to. exponential. form. and. explain. your. answer.
2. Convert.3.21.x.10-5. to.ordinary.form. and.explain.your.answer.


1. Convert.845.3.=.larger.than.1.=.positive.exponent,.move.decimal.2.places
=.8.453.x.102
2. Convert.3.21.x.10-5. =.negative.exponent.=.smaller.than.1,.move.decimal.5
places.=.0.0000321

Question. 2

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he.exam.


Using. the. following. information,. do. the. conversions. shown. below,. showing. all.wor
k:
1.ft.=.12.inches 1.pound.=.16.oz 1.gallon.=.4.quarts
1.mile.=.5280.feet 1.ton.=.2000.pounds 1.quart.=.2.pints
kilo.(=.1000).1/100 milli.(=.1/1000).dec centi.(=
) i.(=.1/10)


1. 24.6.grams.=.?.kg

2. 6.3.ft.=.?.inches


1. 24.6.grams.x.1.kg./.1000.g.=.0.0246.kg
2. 6.3. ft. x. 12. in. /. 1. ft. =. 75.6. inches

please. always. use. the. correct. units. in. your. final. answer

Question. 3

,Portage.Learning./.CHEM.104./.Module.1.to.6.Exams


Click. this. link. to. access. the. Periodic. Table.. This. may. be. helpful. throughout.t
he.exam.


Do.the.conversions. shown.below,. showing.all. work:
1. 28oC.=.?.oK
2. 158oF.=.?.oC
3. 343oK.=.?.oF

1. 28oC. +. 273. =. 301. oK o
C.→. oK.(make.larger)
+273
2. 158oF. -. 32.÷.1.8. =.70.oC o
F.→. oC.(make.smaller)
-32.÷1.8
3. 343oK. -.273.=.70.oC. x.1.8. +.32.=.158. oF o
K.→.oC.→. oF

Question. 4

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he.exam.


Be. sure. to. show. the. correct. number. of. significant. figures. in. each. calculation.


1. Show. the. calculation. of. the. mass. of.a. 18.6. ml. sample. of.freon. with.d
ensity.of.1.49.g/ml


2. Show. the. calculation. of. the. density. of. crude. oil.if. 26.3. g. occupies. 30.5.
ml.

1. M.=.D.x.V.=.1.49.x.18.6.=.27.7.g
2. D.=.M./.V.=.26.3./.30.5.=.0.862.g/ml

Question. 5

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he.exam.


1. 3.0600. contains.?.significant. figures.
2. 0.0151. contains.?.significant. figures.

,Portage.Learning./.CHEM.104./.Module.1.to.6.Exams


3. 3.0600.÷.0.0151.=.?.(give.answer.to.correct.number.of.significant.f
igures)

1. 3.0600. contains. 5. significant. figures.
2. 0.0151. contains. 3. significant. figures.
3. 3.0600.÷.0.0151.=.202.649.=.203.(to.3.significant.figures.for.0.0151)


Question. 6

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he.exam.
Classify.each.of.the.following.as.an.element,.compound,.solution.or.heterogeneo
us.mixture.and.explain.your. answer.
1. Coca. cola
2. Calcium
3. Chili


1. Coca.cola.-.is.not.on.periodic.table.(not.element).-
.no.element.names.(not.compound)

appears.to.be.one.substance.=.Solution

2. Calcium.-.is.on.periodic.table.=.Element

3. Chili. -.is. not.on.periodic.table. (not.element). -
.no. element. names. (not.compound)

appears. as. more.than. one.substance.(meat,. beans,
sauce).=.Hetero.Mix

Question. 7

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he.exam.


Classify. each. of. the. following. as. a. chemical. change. or. a. physical. change


1. Charcoal. burns
2. Mixing. cake. batter. with. water

, Portage.Learning./.CHEM.104./.Module.1.to.6.Exams


3. Baking.the.batter.to.a.cake


1. Charcoal. burns. -. burning. always. =. chemical. change
2. Mixing.cake.batter. with.water.-.mixing. =.physical.change
3. Baking.the.batter.to.a.cake.-
.baking.converts.batter.to.new.material.=.chemical.change




Click.this.link.to.access.the.Periodic.Table..This.may.be.helpful.throughout.t
he.exam.


Show.the.full.Nuclear.symbol.including.any.+.or.-
.charge.(n),.the.atomic.number.(y),.the.mass.number.(x).and.the.correct.ele
ment.symbol.(Z).for.each.element.for.which.the.protons,.neutrons.and.electr
ons.are.shown.-.symbol.should.appear.as.follows:.xZy+/-.n


31.protons,.39.neutrons,.28.electrons

31. protons. =.Ga31,.39.neutrons. =. 70Ga31,.28. electrons. =. (+31. -.28.=. +3)
=. 70Ga31+3

Question. 9

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he.exam.


Name.each.of.the.following.chemical.compounds.. Be.sure.to.name.all.acids.a
s.acids.(NOT.for.instance.as.binary.compounds)


1. PF5
2. Al2(CO3)3
3. H2CrO4

1. PF5. -. binary. molecular.=.phosphorus. pentafluoride
2. Al2(CO3)3. -. nonbinary. ionic.=.aluminum.carbonate