El jugo de limón tiene una concentración de iones hidrógeno de 1 x 10-3 mol/ L. Calcula la concentración de iones hidroxilos.

You are attempting to recrystallize a crude product mixture. you add the appropriate amount of hot solvent and are allowing the solution to slowly cool to room temperature. however, at room temperature no crystals have appeared, which of the following methods should be used to induce crystallization? choose all correct answers. a) place the flask in an ice bath. b) swirl the contents of the flask. c) add a small seed crystal of the desired product. d) scratch the inside of the glassware using a stir rod. it can be multiple choices

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas

Calculate the mass of 0.750 mol of the following substance. na3po4. , i'm not quite sure on how to set up the problem to solve! : (