CHEM 1020 LAB EXAM | QUESTIONS WITH VERIFIED
ACCURATE ANSWERS | 2026
Do you think it's important to use the same balance for the entire experiment? -
Answers - Yes, since different balances can display slightly different results, as they can
have a different baseline.
How do you think pennies made before 1983 differ from pennies made after 1983? -
Answers - They differ in their metal composition, with prior 1983 pennies containing
mostly copper and post 1983 pennies containing mostly zinc.
Explain the importance of units - Answers - Units are important, as they're standard
quantities used to specify measurements, allowing us to keep track of different amounts
and identify what we are talking about. (Helps to distinguish between calculations)
Explain the difference between mass and weight. - Answers - Mass: A measure of the
quantity of matter within it, as the matter that exists inside a structure/surface.
Weight: Is referring to a measure of the gravitational pull that exists on the matter itself,
so how much it weighs on Earth can be different than on other planets based on the
strength of the pull of gravity there.
Decantation - Answers - A chemical process of separating mixtures, through the
removal of a liquid layer that lacks precipitate or the solids left by a solution.
The conservation of mass principle - Answers - The mass must remain constant.
If you calculate the mass percent of water in your copper sulfate pentahydrate
compound using your experimental data and find that it is too low, what do you think
happened? - Answers - The compound was most likely heated too much, as if
overheated the remaining molecular structure could decompose.
Hydrate - Answers - Is known as an ionic compound that is simple and includes water
as a crucial part of the overall molecular structure.
The Law of Definite Proportions - Answers - The idea that samples of every chemical
compound include proportions that remain constant and/or are a fixed ratio.
Theoretical Yield - Answers - The total amount of product that is possible to be made
into a chemical reaction, which is based on the amount of limiting reactant that is found.
Hydrates are wet compounds - Answers - False
ACCURATE ANSWERS | 2026
Do you think it's important to use the same balance for the entire experiment? -
Answers - Yes, since different balances can display slightly different results, as they can
have a different baseline.
How do you think pennies made before 1983 differ from pennies made after 1983? -
Answers - They differ in their metal composition, with prior 1983 pennies containing
mostly copper and post 1983 pennies containing mostly zinc.
Explain the importance of units - Answers - Units are important, as they're standard
quantities used to specify measurements, allowing us to keep track of different amounts
and identify what we are talking about. (Helps to distinguish between calculations)
Explain the difference between mass and weight. - Answers - Mass: A measure of the
quantity of matter within it, as the matter that exists inside a structure/surface.
Weight: Is referring to a measure of the gravitational pull that exists on the matter itself,
so how much it weighs on Earth can be different than on other planets based on the
strength of the pull of gravity there.
Decantation - Answers - A chemical process of separating mixtures, through the
removal of a liquid layer that lacks precipitate or the solids left by a solution.
The conservation of mass principle - Answers - The mass must remain constant.
If you calculate the mass percent of water in your copper sulfate pentahydrate
compound using your experimental data and find that it is too low, what do you think
happened? - Answers - The compound was most likely heated too much, as if
overheated the remaining molecular structure could decompose.
Hydrate - Answers - Is known as an ionic compound that is simple and includes water
as a crucial part of the overall molecular structure.
The Law of Definite Proportions - Answers - The idea that samples of every chemical
compound include proportions that remain constant and/or are a fixed ratio.
Theoretical Yield - Answers - The total amount of product that is possible to be made
into a chemical reaction, which is based on the amount of limiting reactant that is found.
Hydrates are wet compounds - Answers - False
