Question 1: Which is not a clue that a chemical change has happened?
A. new substance is forme...
Question 1: Which is not a clue that a chemical change has happened?
A. new substance is formed
B. temperature change
C. size change
D. gas is produced
Question 2: Which of the following represents chemical change?
A. wood burning
B. ice freezing
C. sugar dissolving
D. wood being sanded
Question 3: Which of the following food changes represents a physical change?
A. toasting bread
B. baking a cake
C. making chocolate milk D. cooking an egg
Question 4: Which of the following is an example a chemical change?
A. water evaporating
B. melting ice
C. food rotting
D. boiling water
Answers: 1
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Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?
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Afamily is one another name for a group on the table of elements.
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Maria wants to determine which type of disinfectant kills the most bacteria. which of the following is the best way for maria to determine this? a. ask ten different companies that make disinfectants which type is best. b. put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate. c. interview ten different people to determine which type of disinfectant they prefer. d. put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.
Answers: 1
Chemistry, 22.06.2019 13:20
Can someone me with 3 and 4 plz. this is for masteries test.
Answers: 2
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