In the presence of acid, phenol red turns yellow. As the pH rises (becomes alkaline), the solution returns to red. Based on this explanation, the uptake of CO2 by a plant in distilled water containing CO2 and a drop of phenol red would cause the water solution to.

Turn Yellow

Explanation:

Phenol red turns yellow in an acidic medium and red in a basic(alkaline medium) based on the explanation above.

A solution of carbon dioxide is slightly acidic however in the real sense carbon dioxide is not an acid. The acidic property is caused by the formation of carbonic acid (H2CO3) when CO2 is dissolved in water.

it should be p1 v1 = p2 v2

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6