CHEM 103 FINAL EXAM Latest Update 2025-2026 Exam 295 Questions with 100% Verified Correct Answers Guaranteed A+
% by mass - CORRECT ANSWER: %(m/m) = mass of solute/ mass of solution x 100
% by volume - CORRECT ANSWER: %(v/v)= volume of solute/volume of solution x 100
% mass-volume - CORRECT ANSWER: %(m/v)= mass of solute/ volume of solution
x100
1.00 atm equals ...... - CORRECT ANSWER: 1 torr
14.7 psi - CORRECT ANSWER: 1.00 atm equals ....
5 types of reactions - CORRECT ANSWER: combustion
composition decomposition single replacement double replacement
760 mmHg equals .... - CORRECT ANSWER: 1.00 atm
accuracy - CORRECT ANSWER: refers to the correctness of measurement data
acid base indicator - CORRECT ANSWER: a compound that exhibits different colors
depending on the pH of its solution 1 / 4
acid ionization constant - CORRECT ANSWER: Ka - an equilibrium constant for the
ionization of an acid in aqueous solution to H+ and its conjugate base
Ka = H+ A-/ HA Acid strength increases as the magnitude of Ka increases
acid properties - CORRECT ANSWER: 1. substances that ionize when added to water
- acids react with metal that are chemically active to produce H2
- acids affect the colors of acid-base indicators
- acids neutralize bases
- dilute acids have a sour taste
ALWAYS ADD ACID TO WATER
acid-base titration - CORRECT ANSWER: when a known acid or base is added to an
unknown base or acid until it reaches its end point. This uses a standard solution to determine the concentration of another solution (molarity). It is a form of volumetric analysis
acid to base or base to acid
acidic salt - CORRECT ANSWER: salt of strong acid and weak base. It is basic in water
acidic solution - CORRECT ANSWER: H+ > OH-
activation energy - CORRECT ANSWER: min. amount of kinetic energy needed for the collision of reactant particles to result in a chemical reaction.
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alkali metals - CORRECT ANSWER: group 1A
alpha decay - CORRECT ANSWER: radioactive nucleus emits an alpha particle, a new nucleus results
the mass number of the new nucleus is 4 less than that of the initial nucleus the atomic number is decreased by 2
alpha particle decay - CORRECT ANSWER: 238U -----> 4He + 234Th
92 2 90
amorphous solid - CORRECT ANSWER: atoms have no set pattern and arranged
randomly
EX. Glass
amphiprotic - CORRECT ANSWER: substance that can act as either an acid or base
anhydrous - CORRECT ANSWER: hydrated crystal with water removed
aqueous solution - CORRECT ANSWER: water is the solvent
arrhenius acid - CORRECT ANSWER: in water produces H+
arrhenius base - CORRECT ANSWER: in water produces OH+
atom - CORRECT ANSWER: smallest part of an element that contains 3 subatomic
particles 3 / 4
atomic mass number - CORRECT ANSWER: protons plus neutrons
atomic number - CORRECT ANSWER: number of protons in atom
Avogadro's Law - CORRECT ANSWER: equal volumes of gases at the same
temperature and pressure contain the same number of molecules
background radiation - CORRECT ANSWER: radiation that comes form natural sources to which living organisms are exposed on a continuing basis
balancing nuclear equations - CORRECT ANSWER: in a balanced nuclear equation,
the sum of the mass numbers and the sum of the atomic numbers for the nuclei of the reactant and the products must be equal
barometer - CORRECT ANSWER: device that measures atm pressure
base - CORRECT ANSWER: puts OH1- into solution instead of H1+ like an acid
base properties - CORRECT ANSWER: 1. bases are electrolytes
- bases cause indicators to turn a characteristic color
- bases neutralize acids
- water solutions of bases taste bitter and feel slippery
- bases emulsify fats and oils
bases in household products - CORRECT ANSWER: used to clean, remove grease,
and to open drains
weak bases: window cleaner - NH3
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