Which observation most likely indicates that a physical change has taken place?(1 point)
A. A reaction occurs.
B. An odor occurs.
C. The temperature increases.
D. The process is reversible.
Why is freezing water a physical change?(1 point)
A. A temperature change occurs.
B. The new and original substances are different.
C. Heat is released during the process.
D. A phase change occurs.
Which option is an example of a chemical change?(1 point)
A. chopping vegetables
B. stretching a rubber band
C. folding paper
D. burning wood
plase
Answers: 1
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Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.
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How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:
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Chemistry, 22.06.2019 19:30
Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!
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Which observation most likely indicates that a physical change has taken place?(1 point)
A. A react...
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