Answer:
Review the procedure
Explanation:
Reviewing the procedure needs to be done before beginning a laboratory investigation, so the investigation can be done correctly and the correct data can be collected.
The other 3 answer choices should be done during or after the investigation, as they all involve data. Data is collected during the investigation.
Explanation:
Description
The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.
Answer:
a. 19
Explanation: Divide by two, Because there are only two genders of cats.