What is the formula for this ionic crystal

Asolution is made by dissolving 25.5 grams of glucose (c6h12o6) in 398 grams of water. what is the freezing point depression of the solvent if the freezing point constant is -1.86 °c/m? show all of the work needed to solve this problem.

List four observations that indicate that a chemical reaction may be taking place

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?