Chem 120 final 2025 - Study guides, Class notes & Summaries

JMU Chem 120 Final | Questions and Correct Answers | Latest Update 2024/2025 | Graded A+ scientific notation - Answer -3.94 x 10⁷= 0.000008 = 8.0 x 10⁻⁶ measured v. exact numbers - Answer -measured = obtained through measurement and are uncertain exact = obtained through counting and are certain precision v. accuracy - Answer -precision = close to each other accuracy = close to the actual number conversion factor - Answer -a ratio of equivalent measurements used to convert a q...

CHEM-120 CHAMBERLAIN FINAL EXAM | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass Chemistry - Answer -The study of the properties of matter and how matter changes Basic Unit in Chemistry - Answer -atom Types of Chemistry - Answer -Green Chemistry Sustainable Chemistry green chemistry - Answer -uses materials and processes that are intended to prevent or reduce pollution at its source replacing rare hazardous with more abundant less hazardous Example of green chemi...

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...

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 ...

Chem 120 Final | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass Levelling Effect - Answer -the inability of a solvent to differentiate amongst the relative strength of all acids OH- - Answer -the strongest base possible H3O+ - Answer -the strongest acid possible Differentiating effect - Answer -the ability of a solvent to differentiate among the relative strengths of all acids Common Ion Effect - Answer -the shift in equilibrium caused by the addition of a compound...

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 | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass Significant Figure - Answer -a digit that is either reliably known or closely estimated conversion factors - Answer -relationship between two quantities expressed as a fraction (1 inch/2.45cm) element - Answer -the most basic form of matter that exists under ordinary condidtions compound - Answer -a unique, pure substance that is composed of two or more elements which are chemically combined atom - A...

chem 120 final exam study guide | Questions and Correct Answers | Latest Update 2024/2025 | Graded A+ chemistry - Answer -the science that tries to understand how matter behaves by studying how atoms and molecules behave scientific method - Answer -ways of learning that emphasizes observation and experimentation (self correcting) observation - Answer -we go out in nature and ask questions we measure or observe some aspect of nature hypothesis - Answer -tentative interpretation of an ob...

CHEM 120 FINAL EXAM | Questions and Correct Answers | Latest Update 2024/2025 | Graded A+ ionic compounds - Answer --deals with charged particles -oppositely charged particles are attracted to each other -look for presence of metals and polyatomic ions molecular compounds - Answer --share electrons -nonmetals -no polyatomic ions unless its an acid Type I metals - Answer --ionic compounds -group 1A,2A,3A -one type of charge state -Name of metal +ion -if metal+nonmetal: name of meta...

Chamberlain Final Chem 120 | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass Polyatomic ions - Answer -ions that are made of more than one atom Nitrate - Answer -NO3- Nitrite - Answer -NO2- bicarbonate (hydrogen carbonate) - Answer -HCO3- Sulfate - Answer -SO4 2- Sulfite - Answer -SO3 2- Carbonate - Answer -CO3 2- cyanide - Answer -CNHydroxide - Answer -OHPhosphate - Answer -PO4 3- Ammonium - Answer -NH4+ Ionic compounds - Answer -- crystalline solid- hard, britt...