Chem 120 final exam - Study guides, Revision notes & Summaries

Chem 120 final exam questions and answers 2024

significant figures a digit that is either reliably known or closely estimated Significant Figure Rules 1. All non-zero digits are always significant 2. Zeroes between non-zero digits are always significant 3. Zeroes to left of first non-zero digit (either before or after decimal point) are never significant 4. Zeroes to the right of last non-zero digit a. after decimal point are always significant b. which are before decimal point are not significant conversion factor relationship...

Chem 120 final exam questions and answers 2024.

Chem 120 final exam | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass What is the correct order of melting points for the following alkanes, from highest to lowest temperature? - Answer -heptane > hexane > ethane > methane 2. Given an alkane that contains 25 carbon atoms. How many hydrogen atoms are present in its structure? a) - Answer -) 52 3. Which of the following properly describes constitutional (structural) isomers? - Answer -compounds with the same ...

CHEM 120 FINAL EXAM PRACTICE QUESTIONS & ANSWERS: (TCO 12) The DNA double helix is _____. (Pts. : 5) made up of two polynucleotide strands composed of adenine and thymine a puzzle to geneticists composed of adenine and guanine composed of two chromosomes

Chem 120 Final Exam | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass molecular mass (molecular weight) - Answer -the sum of the atomic masses, in atomic mass units, of all the atoms in the formula of a compound empirical formula - Answer -a chemical formula showing the ratio of elements in a compound rather than the total number of atoms Avogadro's number (Mole) - Answer -6.02 x 10^23 proton - Answer -A subatomic particle that has a positive charge and that is ...

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CHEM 120 FINAL EXAM (PRACTICE PROBLEMS) QUESTIONS WITH 100% CORRECT ANSWERS

ionic compounds -deals with charged particles -oppositely charged particles are attracted to each other -look for presence of metals and polyatomic ions molecular compounds -share electrons -nonmetals -no polyatomic ions unless its an acid Type I metals -ionic compounds -group 1A,2A,3A -one type of charge state -Name of metal +ion -if metal+nonmetal: name of metal+base name of nonmetal +ide -if metal+polyatomic ion: name of metal+name of polyatomic ion Type II metals -ionic com...

CHEM 120 Final Exam | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass B - Answer -How many bonds can nitrogen have? Which rule or principle should be used? A) Five bonds; octet rule. B) Three bonds; octet rule. C) Three bonds; the Hund's rule. D) Five bonds; the Aufbau Principle. C - Answer -When two hydrogen atoms meet, they will attract to each other and form a bond (and a H2 molecule). Why? A) Because electrons like to stay together. B) Because electrons li...