Me with these

4. calculate the molar masses of the following chemicals. be sure to show all work and indicate your final answer with a circle or box.
a. cl2

b. becl2

c. (nh4)2so4

d. k2(no3)

5. given the number of moles of each find the number of grams of each.

c. 21.5 moles of sodium carbonate

d. 6 moles of hexane c6h6

6. given the mass of each substance in grams find the number of moles of each:
a. 10 grams of hf

b. 1.2 grams of fecl3

c. 12.7 grams of co2

Two things that biomedical has invented or innovated

24 points and brainliest to anyone who can answer under 10 minutes with best ! the table below shows the role of different substances during photosynthesis. substance role during photosynthesis glucose stores chemical energy water combines with glucose to form carbon dioxide chlorophyll traps sunlight which of the following statements would correct one of the roles listed in the table? glucose combines with carbon to form water. chlorophyll reacts with light to produce carbon dioxide. water combines with carbon dioxide during photosynthesis. chlorophyll stores chemical energy needed for photosynthesis.

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?