Hon placed aquatic plants in several test tubes that were filled with water. then, he placed half of the test tubes in a dark closet and the other half in a well-lit room. when he recorded his data, some of the plants had formed many small bubbles on the leaves, and some did not.

which describes what hon most likely observed and the reason for these results?
a. the plants in the dark formed bubbles because they released hydrogen gas.
b. the plants in the dark formed bubbles because they released water vapor.
c. the plants in the light formed bubbles because they released carbon dioxide gas.
d. the plants in the light formed bubbles because they released oxygen gas.

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

List four observations that indicate that a chemical reaction may be taking place

Achemist wants to extract copper metal from copper chloride solution. the chemist places 0.50 grams of aluminum foil in a solution containing 0.75 grams of copper (ii) chloride. a single replacement reaction takes place. (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction? a) approximately 0.36 grams, because copper (ii) chloride acts as a limiting reactant b) approximately 1.8 grams, because copper (ii) chloride acts as a limiting reactant c) approximately 0.36 grams, because aluminum acts as a limiting reactant d) approximately 1.8 grams, because aluminum acts as a limiting reactant