7. A pinch of bread was placed inside a test tube and heated until it became blackish in color and released some gas. What can be inferred from the observations? The bread is a solution. B. The bread is composed of only one substance. C. The bread is a mixture of different substances that react to release gas. D. The bread is a pure substance with solid and gaseous materials.
Answers & Comments
Answer:
B
Explanation:
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