Chem 103 Q&A Exam Bundle

The Law of Definite Proportions states that in a given chemical compound, the elements are always combined in the same proportions by _______________ mass The Law of Conservation of mass states that no detectable gain or loss of mass occurs in chemical reactions. Mass is _______________. conserve...

What is chemistry? Chemistry is the study of the physical and compositional changes of matter. Chemistry is called the Central Science. Many health related areas of study are based on Chemistry. Matter Matter is anything that has mass, occupies space and is made-up of atoms or parts of at...

When making observations, what are the things you should describe? smell, appearance, and state of matter of chemicals before and after the reaction, how long the reaction occurred, and names of chemicals What is the density of a substance? The amount of matter contained in a specific sized sampl...

What is the purpose of the litmus paper test? It is used to see if the gas reacts with water to generate an acid or base. How do you test a gas to see if it supports combustion? You use a glowing splint by igniting it, blowing out the flame, and putting the glowing splint on the neck of the bottl...

What color and what type of reaction does Baeyer's test indicate when reacted with a Alkane? STAYs purple NEGATIVE reaction What color and what type of reaction does Baeyer's test indicate when reacted with a Alkene? TURNS red POSTIVE reaction Bromine in CCl4 with Alkane turns the re...

Avogadro's number 6.022 x 10^23 atoms = 1 mole 1 u = ___ g 1.661 x 10 ^-24 g formula mass the sum of the average atomic masses of each atom represented in the chemical formula and is expressed in atomic mass units. --The formula mass of a covalent compound is also called the molecular mass....

ionic bonds two oppositely charged ions (2Na + Cl₂ = 2Na⁺+2Cl⁻) metals tend to ______ electrons lose nonmetals tend to ______ electrons gain covalent bonds share at least one pair of electrons so both atoms have 8 valence electrons 2 types of covalent bonds polar, nonpolar polar...

The _____ of a chemical reaction refers to the rate of the reaction. kinetics List the four factors that control kinetics of a chemical reaction. The nature of the reaction itself, the concentration of the reactants, the temperature, and the presence of a catalysts What color is the permangana...

atom Basic unit of matter; made of protons, neutrons, and electrons; have a nucleus that contains p and n and an electron cloud that surrounds it proton A subatomic particle that has a positive charge and that is found in the nucleus of an atom neutron A subatomic particle that has no charge a...

Amorphous solids particles are arranged in a random fashion Colligative properties physical properties of solvents that are dependent on the concentration of the solute present and the identity of the solvent but not on the identity of the solute. They include vapor pressure, freezing point and b...

Which of the following is an example of a physical property? a. Ability to change color b. Flammability c. Density d. Solubility Exam 1 c. Density Which of the following is evidence of a chemical change? a. Releasing bubbles of gas b. Floating in water c. Crystallization d. Vaporizatio...