Which of the following is a tentative explanation for a set of observations?

a. Law

b. Hypothesis

c. Theory

d. Phenomena

e. Prediction - correct answer b. Hypothesis



Which of the following cannot be separated into simpler substances by chemical means?

a. Element

b. Emulsion

c. Compound

d. Homogeneous mixture

e. Heterogeneous mixture - correct answer a. Element



Which of the following is an extensive property?

a. Density

b. Temperature

c. Mass

d. Specific Heat

e. Pressure - ...
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