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While 4.33g of a nonelectrolyte solute is dissolved in water to make 205mL of solution at 21 C, the solution exerts an osmotic pressure of 891torr.
Explain what is the molar concentration of the solution?
Explain how many moles of solute are in the solution?
Explain what is the molar mass of the solute?
the NaOH solution is required to reach the endpoint in the titration of a 7.248 sample of vinegar. What is the mass percent of acetic acid in this vinegar sample?
Sodium borohydride reacts very slowly with ethanol to evolve a gas. Write a balanced equation for this reaction.
Write the ground state electron configuration , both full notation and noble gas abbreviation and indicate the number of valence electrons for Al, I, Rb, Ar, Mg
What is the molality of a solution in which 25 g of sodium chloride is dissolved in 2.0 kg of water
Consider a mixture is a 2 dm^3 flask at 27 degree C. For each of the following mixtures, calculate the partial pressure of each gas, the total pressure, and the compositon of the mixture in mole percent. (Hint: for mole percent take your answer fo..
13-Chlorophyll found in plant cells as well as essential to the process of photosynthesis, contains 2.72% Mg by mass. Presuming one magnesium atom per chlorophyll molecule, Compute the molecular weight of chlorophyll.
Calculate in how many years these signs will have to be replaced. Assume that the end lifetime is when the emission from the tritium is down to only 37% from the initial emission when installed
when 0.981 g of tartaric acid is dissolved in 11.23g of water the solution freezes at -1.26 c. find the empirical and
is it possible for some of the aldehyde to not have reacted and beseen in the product mixture? or does the reaction
A 0.160-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium? Assume the formation constant* of Ni(NH3)62 is 5.5 × 108.
What mass of sodium benzoate should be added to 140.0 mL of a 0.15 M benzoic acid solution in order to obtain a buffer with a pH of 4.25
How many thermodynamic degrees of freedom are available to an equilibrium system consisting of an ice cube floating in a glass of water
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