CHEM 101 EXAM 1 PRACTICE QUESTIONS WITH CORRECT ANSWERS

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CHEM 101 EXAM 1 PRACTICE QUESTIONS WITH CORRECT ANSWERS

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CHEM 101 EXAM 1 PRACTICE QUESTIONS WITH CORRECT ANSWERS

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CHEM 101 EXAM 1 PRACTICE QUESTIONS
WITH CORRECT ANSWERS
WhatBisBtheBchemicalBformulaBforBIronBOxide?BWhatBromanBnumeralBneedsBtoBgoBwithBit?B-
BCORRECTBANSWERB-Fe2O3

IronB(III)BOxide

WhatBisBtheBnameBofBaBcompoundBwithBtheBchemicalBformulaBN2O5?B-BCORRECTBANSWERB-
DinitrogenBpentoxide.

CalculateBtheBnewBvolumeBwhenBtheBpressureBonB5.0LBofBgasBatB1.8BatmBisBincreasedBtoB4.5Batm.B-
BCORRECTBANSWERB-P1V1=P2V2

(1.8)(5)=(4.5)(x)

xB=B2

NewBvolumeBisB2BL.

90%BofBtheBuniverseBtodayBisBmadeBupBofBtwoBelements.BWhatBareBthey?B-BCORRECTBANSWERB-
TheBfirstBtwoBelementsBonBtheBperiodicBtable.

HydrogenB(H)BandBHeliumB(He).

NameBtheBhalogens.B-BCORRECTBANSWERB-
FluorineB(F),BChlorineB(Cl),BBromineB(Br),BIodineB(I),BAstatineB(At)

FunnyBClownsBBroilBInnocentBAnts.

ConvertB8.3Bx10^7BinchesBtoBmeters.

1BmeterB=B39.4BinchesB-BCORRECTBANSWERB-InBcalculator:B(8.3x10^7)/39.4

Ans:B2,106,598.98B

, CorrectBSigBfigs:B2,100,000BORB2.1x10^6

Reminder:BalwaysBbeBextraBcarefulBusingBscientificBnotationBinByourBcalculator.BI'dBsuggestBalwaysB
usingBparentheses.

WhichBofBtheBfollowingBisBaBhomogeneousBmixture?

SaltBwater

PureBsulfur

BubbleBteaB-BCORRECTBANSWERB-saltBwater

aBhomogenousBmixtureByouBcanBthinkBofBaB"blended"BmixtureBorBaBdissolvedBsolution.

ABheterogenousBmixtureBisBmoreBlikeBiceBcubesBinBwater,BorBbobaBandBmilkBtea.

WhatBisBtheBchemicalBformulaBofBAluminumBsulfide?B-BCORRECTBANSWERB-Al2S3

WhatBisBtheBchargeBofBaBbariumBion?BBaB-BCORRECTBANSWERB-Ba^2+

HowBmanyBprotons,Bneutrons,BandBelectronsBareBinBaBcalciumBatom?B

HowBmanyBinBaBcalciumBion?B-BCORRECTBANSWERB-
TheBatomicBnumberBisB20.BCalciumBhasB20Bprotons.B

TheBmassBisB40.08,BwhichBaccountsBforBtheBnumberBofBprotonsB+Bneutrons.B#BprotonsB-
BatomicBmassB=B#Bneutrons

40.08B-B20B=B20Bneutrons.

20Belectrons.BElectronsBshouldBalwaysBbeBtheBsameBamountBasBtheBprotonsB(soBtheBatomicBnumbe
r).BUNLESSBit'sBaBchargedBion.

CaBionBhasBaB2+BchargeBmeaningBitBhasBTWOBLESSBelectrons,BmakingBitBmoreBpositive.

InBthisBcase,BtheBnumberBofBprotonsBandBneutronsBdon'tBchange,BbutBtheBnumberBofBelectronsBdec
reasesBbyBtwo,BleavingB18BelectronsBforBtheBCa++Bion.

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Uploaded on: May 22, 2025
Number of pages: 5
Written in: 2024/2025
Type: Exam (elaborations)
Contains: Questions & answers

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CHEM 101 EXAM 1 PRACTICE QUESTIONS WITH CORRECT ANSWERS

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