Question 1 Not yet answered Marked out of 1 According to our definition of physi

Question

Question 1 Not yet answered Marked out of 1 According to our definition of physical change, a physical change Select one O a, is indicated by a change, but no chemical reaction occurs. O b. is indicated by the release or absorption of heat. O c. is indicated by a dramatic change of color o d. is indicated by the evolution of a gas. Flag question Question 2 Not yet answered Marked out of 1 Fertilizer is Select one 0 a, neither of the above O b, a pure substance Flag question c. a mixture Question 3 When you placed the Alka Seltzer in water, you observed bubbling and the piece of tablet eventually disappeared. The bubbling was due to Not yet anawered Select one o a the heat released by the dissolving tablet causes the water to boil O b the acetylsalicylic acid in the tablet reacting with the water to form gaseous oxygen Flag question Cthe cnnc acid in the tablet reacting with the sodium bicarbonate in the tablet to torm gaseous carbon dioode. d none of the above Question 4 Not yet answered Marked out of 1 P Flag question What color was the copper sulfate solution? Select one O a. orange b. blue ° C. colorless O d, green e.red f. yellow Question 5 Not yet answered Marked out of 1 P Flag question The burning of a candle is a chemical change Select one O True O False

Explanation / Answer

1. answer: a. is indicated by a change.but no chemical reaction occurs.

2. answer: c. mixture (combination of two or more compounds)

3. answer: c. the citric acid in the tablet reacting with the NaHCO3 in the tablet to form co2 gas

4. answer: b.blue

5. true

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