Chemistry, 17.08.2021 01:00, jdvazquez18p7a7vs
A student in a lab holds an iron nail over an open flame, and no reaction occurs. The nail is then filed, creating small pieces of iron shavings. These pieces burn brightly when placed over an open flame.
Which statement accurately identifies one of the changes that occurs as a physical or chemical change?
A. Filing the nail is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
B. Burning the iron filings is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
C. Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.
D. Burning the iron filings is a physical change because the composition of the material does not change but the general appearance of the iron does change.
Answers: 3
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Chemistry, 22.06.2019 12:50, martinez6221
What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate
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A student in a lab holds an iron nail over an open flame, and no reaction occurs. The nail is then f...
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