Chem 120 - Study guides, Class notes & Summaries

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 | 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 Exam #1 | Questions and Correct Answers | Latest Update 2024/2025 | Graded A+ define matter - Answer -anything that has mass and takes up space what is not considered matter? - Answer -light, heat, electricity definite shape, definite volume - Answer -solid indefinite shape, definite volume - Answer -liquid indefinite shape, indefinite volume - Answer -gas pure substance - Answer -one substance; definite and constant composition; can't be separated into 2 kinds of matter by ...

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- Exam #1 | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass What is a good scientific definition of a chemical? - Answer -Chemicalany substance made up of one or more elements from the periodic table What is the difficulty in defining the chemical industry in terms of the periodic chart? - Answer -The definition of a chemical is too broad. Too much would be included in the chemical industry. What is the chief source of the chemicals known as inorganic chemic...

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 | 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 | 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 Exam 1 | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass Fahrenheit to Celsius Equation - Answer -C=(F-32)/1.8 Celsius to Fahrenheit Equation - Answer -F=1.8C+32 Celsius to Kelvin Equation - Answer -C=K-273.15 Kelvin to Celsius Equation - Answer -K=C+273.15 Rutherford - Answer --Nuclear Theory of the Atom - Directed Alpha particles at a thin sheet of gold and observed they did not go straight through as expected -Principles 1: Most of atom's mass is in ...

chem120 exam 1 | Questions and Correct Answers | Latest Update 2024/2025 | 100% Pass H-1 (periodic table) - Answer -Hydrogen He-2 (periodic table) - Answer -Helium Li-3 (periodic table) - Answer -Lithium Be-4 (periodic table) - Answer -Berylium B-5 (periodic table) - Answer -Boron C-6 (periodic table) - Answer -Carbon N-7 (periodic table) - Answer -Nitrogen