A student dissolves 15. g of urea not change when the urea dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits. molarity = 0 molality a((NH,),CO)i in 150. mL of a solvent with a density of 1.02 g/mL. The student notices that the volume of the solvent does = x10 0x0

An aqueous zinc bromide solution (ZnBr2) boils at 100.250 °C.  What is the molality of this solution?  The Kb of water = 0.512 °C/m.    ΔT = Kf * m * i       0.488 m     0.512 m     0.252 m     0.163 m

A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.50 g of the solid is dissolved in 50.0 g of water, the freezing point of the solution is lowered by 5.28°C. What is the composition by mass of the solid? g NaNO3 g Mg(NO3)2

A student dissolves 11. g of glucose (C6H₁2O6) in 500. mL of a solvent with a density of 0.80 g/mL. The student notices that the volume of the solvent does not change when the glucose dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits. molarity = molality = 0 0 OXO

In the blanks in the question, you have to decide if its increaseing or decreasing.

Calculate the volume of stock glucose solutions (2.5 % and 15%) that need to be used to prepare 800 mL of glucose solution with a concentration of 13%. In this case % refers to the grams of glucose per 100 mL of water. V1= volume of stock solution with concentration C (2.5%) V2= volume of stock solution with concentration C2 (15 %) You need to determine V, and V2 in mL

The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. Kf(ethanol) = 1.99 °C/mIn a laboratory experiment, students synthesized a new compound and found that when 13.34 grams of the compound were dissolved in 212.8 grams of ethanol, the solution began to freeze at -117.981 °C. The compound was also found to be nonvolatile and a non-electrolyte.What is the molecular weight they determined for this compound?

For this question it’s telling me use KCI which stands for potassium chloride so do I use KCl, (1 atom X 39.0983 Potassium) + (1 atom X 35.453 Chlorine) = (74.5513 g/mol) and use that with 10 ML of 20% Solution. I’ve been stuck on figuring out what I could do for this question. I want a long clarification and steps on it so it could help me know if I’m correct as I’m doing this question on my notebook.

A student dissolves 14. g of sucrose (C,,H,,0,1) in 450. mL of a solvent with a density of 0.85 g/mL. The student notices that the volume of the solvent 22 does not change when the sucrose dissolves in it. Calculate the molarity and molality of the student's solution. Round both of your answers to 2 significant digits. molarity = | x10 molality %3D Continue Submit O 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center MacBook Air 20 888 DD F3 F4 F5 F6 F7 F8 34 00

A student dissolves 10. g of phenol (C,H,OH) in 175. mL of a solvent with a density of 1.03 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. dlo molarity х10 Ar molality