Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that a chemical change has occurred in the substance?
1) If the substance is a liquid or solid, an increase in temperature would indicate a chemical change.
2) If the substance is a liquid, a change of some of the liquid to gaseous form would indicate a chemical change.
3) If the substance is a solid, a change of some of the solid to liquid form would indicate a chemical change.
4) If the substance is a liquid or solid, the production of an odor would indicate a chemical change.
Answers: 3
Chemistry, 22.06.2019 04:30
How much energy is made when a pice of wood burns. how do you know
Answers: 2
Chemistry, 22.06.2019 09:50
Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange
Answers: 1
Chemistry, 22.06.2019 16:30
Asample of freon gas has a volume of 2.23 liters, a pressure of 4.85 kpa, and a temperature of -1.36°c. calculate the volume at a pressure of 1.38 kpa and a temperature of 5.5°c. (show work)
Answers: 1
Chemistry, 22.06.2019 19:00
How many moles of cu are needed to react with 5.8 moles of agno3? cu + 2 agno3 → cu(no3)2 + 2 ag
Answers: 3
Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation wou...
Mathematics, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00
English, 10.02.2021 18:00
Biology, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00
Mathematics, 10.02.2021 18:00