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Match it! Select the correct answer from the pull down...Good luck!
Hydrogen peroxide is a substance often used to disinfect wounds or cuts. Its chemical formula is H2O2. What is the ratio of hydrogen atoms to oxygen atoms?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
Antifreeze is a chemical used to protect cars from radiator leaks, freezing, and overheating. Which statement about antifreeze is most useful to know before planning a long road trip across the southwestern US this summer?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
A student mixes two solutions, planning to produce carbon dioxide. Which of the following is the BEST evidence that a chemical reaction is producing carbon dioxide?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
Drew added yeast and sugar to lukewarm water and placed it in a flask. He stretched a balloon over the opening of the flask. He noticed small bubbles rising along the side of the flask as the balloon slowly began to inflate. Drew concluded that--
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
Which of the following is a chemical property associated with wood?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
A student mixes two solutions, planning to produce a chemical reaction. Which of the following is NOT evidence that a chemical reaction is happening?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
Which of the following demonstrates that a new substance can be formed from a chemical reaction?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
Which of the following is a chemical property of iron?
1:1
formation of bubbles
ability to burn
The bubbles indicated a chemical change.
no observable change
rusting over time
Using antifreeze and water in a car's radiator raises the boiling point of the mixture to 256° F.
milk souring
Check it!