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What mass (in grams) of solid Na2SO4 would need to be added to 250 grams of water to make an ideal solution with a boiling point of 103.6°C? (Kb for water is 0.512°C/m)
A. 333 grams
B. 64.8 grams
C. 83.3 grams
D. 111 grams
Consider the reaction that occurs when a solution containing hydrochloric acid (HCl) is added to a solution containing the weak base methylamine (CH3NH2). Write the molecular equation for the reaction
At a certain temperature, the solubility of potassium iodate, KIO3, is 41.1 g/L. Calculate its solubility product constant for this temperature.
Write the overall balanced equation of potassium permanganate with sodium oxalate in acidic solution using the half reaction method. Indicate the oxidation states for each species as well as the oxidizing agent and reducing agent.
calculate the value of DGo in kJ for the combustion of 1 mole of methane to form carbon dioxide and gaseous water at 298 K.
Using a sample of CO 2 occupies a 2.54dm^3 container at STP. Determine the volume of the gas at a pressure of a temperature of 26.0 degree Celsius and 150.0 kPa?
To find the value of the equilibrium constant at each temperature you must first find the value of G0 at each temperature by using the equation G0 = H0 - TS0 For this reaction the values are H0 = +88.3 kJ/mol and S0= 151.3 J/mol*K
Calculate the pH in the titration of 25.0 mL of 0.100 acetic acid by sodium hydroxide after the addition
What scientific principle or law is used in the process of balancing chemical equations. Define the terms limiting reactant and excess reactant.
calculate the amount of solute (g or mL needed to prepare the following solutions: a) 150 g of a 40.0%(m/m)LiBr solution. b) 450 g of a 2%(m/m) KCl solution. c) 225 mL of a 15%(v/v) isopropyl alcohol solution
Calculate the pH of each of the following solutions ( Ka and Kb values are given in Appendix D in the textbook). 0.115 M hydrogen chromate ion (HCrO4^-)
55.0 mL of a 1.70 M solution is diluted to a volume of 288 mL. A 144 mL portion of that solution is diluted using 181 mL of water. What is the final concentration?
the following shows the connectivity of atoms only. Atoms other than carbon and hydrogen are labeled. how many degree of unsaturation are pressent in the compound. chose one of the following answers
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