15.0g ethanol, c2h5oh dissolved in 750. g formic acid has a freezing point of 7.20oc. the freezing point of pure formic acid is 8.40oc. what is the kf (oc/m) for formic acid?

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.

Can someone me with questions 12 and 13 plz.

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.