Acid and Base Characteristics

Substance A Substance B Substance C Substance D
Sour taste Bitter taste Neutral taste Sharp taste
Strongly conducts electricity. Strongly conducts electricity. Weakly conducts electricity. Strongly conducts electricity.
Reacts with most metals to generate hydrogen gas. Can react to make soap. Can react with acids or bases. Generally will not react.

Which substance will cause litmus paper to turn red?

A) A
B) B
C) C
D) D

In the analysis of hair and fiber samples, which does a compound comparison microscope allow for that a conventional compound microscope does not? a. simultaneous observation b. polarization c. fluorescence d. higher magnification

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?