Which of the following describes the role of water in supporting the chemical reactions that occur within various life forms?
a. it is used during photosynthesis to capture sunlight.
b. it is critical in the process of cellular respiration.
c. it adheres to the vascular tissue in plants.
d. it allows sunlight to pass through it.

i’m stuck on this question, but i believe b is the correct answer.

Which metal exist in liquid state and can be cut with knife ?

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.

Which of the following molecules is polar? c3h7oh c2h5cooh