Assuming that strontium nitrate, Sr(NO3)2, forms an ideal solution in water, the van’t Hoff factor (i) is

A student dissolves 8.3 of phenol (CH,OH) in 325. mL of a solvent with a density of 1.12 g/mL. The student notices that the volume of the solvent does not change when the phenol dissolves in it. Calculate the molarity and molality of the student's solution. Be sure each of your answer entries has the correct number of significant digits. molarity x10 molality 미

Under normal conditions, the human adrenal medulla secretes epinephrine (C9H13NO3) at a rate sufficient to maintain a concentration of 10−10 M in circulating blood. To appreciate what that concentration means, calculate the volume of water that you would need to dissolve 1.0 g (about 1 teaspoon) of epinephrine to a concentration equal to that in blood.

. Throat spray is used in relieving pain and imritation caused by sore throat, sore mouth, or canker sores. It is composed of a diluted solution of Phenol in water. The mass percent of the usual throat spray is 1.40% C6H5OH in water. The density of the Phenol solution and Water are known to be 0.9956 g/ml and 1.00 g/ml respectively. Calculate the Molarity of the solution.

A certain liquid X has a normal boiling point of 92.90°C and a boiling point elevation constant Kb=2.15·°C·kgmol−1. Calculate the boiling point of a solution made of 30.g of potassium bromide (KBr) dissolved in 800.g of X. Round your answer to 3 significant digits.

The mole fraction of sodium chloride, NaCl, in a saturated aqueous solution is 0,220. What is the molarity (molar concentration) of this solution if it has a density of 1,150 g.cm–3?