Assuming that the volumes are additive, what volume of water must be added to 35mL of 15%  KOH to make a solution which is 10%?

a 64.0mL portion of a 1.60M solution is diluted to a total volume of 238mL. A 119mL portion of that solution is diluted by adding 125mL of water. what is the final concentration? assume the volumes are additive.

The density of an aqueous solution that is 13.2% by mass of XY ( molar mass 56.8 g/mol ) is 1.10 g/ mL. calculate the molarity of this solution.

A solution is made by diluting 10.0 mL of 0.021 M potassium dichromate to 200mL. What is the molarity of the diluted solution

Calculate the molarity of 29 g of ethanol (C2H5OH) in 545 ml of solution

How many moles of potassium bicarbonate, KHCO3, are present in 75.0 mL of a 0.750 M potassium bicarbonate solution?

This question is part two of three. When answering this problem, report the answer with the appropriate number of significant figures. When entering units, use proper abbreviated units with proper capitalization. A solution is prepared by combining 5.92 grams of an unknown non-electrolyte with 240.0 grams of chloroform. The freezing point of the mixture is -64.80 oC, while the freezing point of pure chloroform is -63.50oC. The kf of pure chloroform is 4.68oC/molal. Based on this information, how many moles of solute are present in this solution? What is the molar mass of the solute?  Report both answers in scientific notation with appropriate sig figs.

34.1 % (NH4 )2SO4   (molar mass = 132.1 g mol−1) has a density of 1.15 g mL−1. What is the molarity of this solution?  (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3)     Determine the boiling point of a solution that contains 78.5 g of compound W (molar mass = 132.5 g mol–1) dissolved in 1088.6 g benzene (C6H6; molar mass = 84.156 g mol–1; Kb = 2.53 °C m–1; boiling point of pure benzene = 80.1 °C). (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3)

How many grams of carbon are in 177.8 mL of a 3.15M solution of octanol(C8H17OH)?|

calculate the mass of QCl2 that can be dissolved in 873.3 mL of solution. The molar mass QCl2 is 355.21 g/mol ksp=4.4 * 10-7