I NEED THIS ASAP PLEASE BE NICE AND ANSWER IT I HAVE NO CLUE!!! A chemistry graduate student combines 3.90 grams of potassium and 12.7 grams of iodine to form potassium iodide. According to the law of conservation of mass, how much potassium iodide should be formed if the reaction proceeds to completion?

A. 8.8 grams

B. 16.6 grams

C. 0.0 grams

D.33.2 grams

12. calculate the hydroxide ion concentration of a solution with ph = 3.25. show all calculations leading to an answer

The picture represents the process that produces most of the energy used by living organisms on earth. which process is represented in the picture? a) the magnetic attraction between two hydrogen nuclei. b) the fusion of hydrogen nuclei to produce a helium nucleus in the core of the sun. c) the fission of hydrogen nuclei to produce a helium nucleus in the core of the sun. d) the chemical reaction between hydrogen nuclei to produce a helium nucleus in earth's atmosphere.

Which elements are found in glucose, the product of photosynthesis? a. carbon, hydrogen, and oxygen b. carbon and hydrogen c. carbon, nitrogen, and oxygen d. hydrogen, nitrogen, and carbon