Calculating Average Atomic Mass An average atomic mass is calculated by taking the mass of each isotope, multiplying it by the %...

January 2023 32 The table below shows the atomic masses and natural abundances of the two naturally occurring isotopes of rhenium. Which...

Solute = a substance that dissolves (for example sugar) Solvent = a substance is able to dissolve a solute ( for example water) Solution...

January 2023 15 Which term is used to express the concentration of an aqueous solution? (1) parts per million (2) heat of fusion (3)...

Redox refers to reduction and oxidation. Let's start with a couple of mnemonics to help us memorize necessary information for the...

January 2023 24 In an electrochemical cell, oxidation occurs at the (1) anode (2) cathode (3) salt bridge (4) switch Solution: Here is...

Acid and base definitions Arrhenius Definition: Acid yields H+ (hydrogen ions) when dissolved in water. Base yields OH- (hydroxide ions)...

January 2023 26 One acid-base theory states that a base is an (1) H- donor (2) H- acceptor (3) H+ donor (4) H+ acceptor Solution:...

In nuclear reactions, one element changes into a new element. This process is called transmutation. There are two tables from the...

January 2023 28 When the nucleus of an atom of neon-19 decays, which particle is emitted? Solution: Table N on the Reference Table shows...