Chemistry, 17.12.2020 19:40 nikitakhrabkov123
During an investigation, students dropped a tarnished penny into a solution of acetic acid and sodium chloride. Tiny bubbles formed around the penny, and the penny was less tarnished after two minutes of soaking in the acetic acid and sodium chloride solution. The student inferred that a chemical reaction occurred.
What evidence supports the student’s inference?
The penny experienced a color change, and a gas was produced.
The penny experienced a color change, and a precipitate was formed.
The penny experienced a color change and is in a new state of matter.
The penny experienced a color change and produced light.
Answers: 2
Chemistry, 22.06.2019 23:30, lizdeleon248
The sum of the oxidation numbers in a neutral compound is always
Answers: 2
Chemistry, 23.06.2019 05:00, MoneyMike42
Select the statement that describe chemical properties a. antacid tablets neutralize stomach acid b. helium is the lightest monatomic element c. water freezes at 0 celsius d. mercury is liquid at room temperature
Answers: 3
During an investigation, students dropped a tarnished penny into a solution of acetic acid and sodiu...
English, 12.01.2021 17:40
Mathematics, 12.01.2021 17:40
Mathematics, 12.01.2021 17:40