Question

Little Joey designed and completed a procedure to determine the amount of water in a chemical compound, called a hydrate. He heats a sample of the compound in a container called a crucible to release water from the compound, thereby decreasing the weight of the sample. His data is summarized in the table.
How could Little Joey increase the validity of his data?
A) Heat the sample more slowly.
B) Use a smaller mass of hydrate.
C) Cover the crucible with a lid.
D) Heat the sample to a constant mass.

Answer 1

B is correct.

Answer 2

It was D

Answer 3

Aweh ;-;
Sorry. v.v

Answer 4

It's ok

Answer 5

most of it were correct cause of you

Answer 6

😊

Answer 7

The explanation for this one:

The correct answer is Heat the sample to a constant mass. Little Joey can't be sure that he's done heating the sample until the mass remains constant.