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What is the percentage by mass of solution formed by dissolving 27.0 grams of HCl in 102.0 grams of water?
How are you able to determine which atom is more electronegative when looking at the periodic table of elements. For example which is more electronegative?
If the enthalpy change for the reaction is 21 kJ/mol, what is the minimum value of the change in entropy for the reaction. Please answer in J/K* mol
Calculate the work(in kilojoules) done during a synthesis of ammonia(see reaction below) in which the volume contracts from 8.6L to 4.3L at a constant external pressure of 44atm.
Calculate the theoretical pH of 0.250 M weak acid, HA. Calculate the theoretical pH of a 2.5 x 10-3 M weak acid, HA, that has a Ka value of 1.2 x 10-4. What happens to % ionization of the weak acid as you dilute the acid?
Explain in one statement how EACH factor affect the rate of reaction at molecular level. Finally in no more than 2 sentences explain why the fourth factor is excluded form Arrhenius equation
A soluation of HO-CH2-CH2-OH is prepared by dissolving 651g of ethylene gylcol in 1.50kg of water. Determine the freezing point of the soluaiton and the vapor pressure of water above the solution 25.0 degrees C.
a. A 0.1044 gram sample of an unknown monoprotic acid required 22.10 mL of 0.0500 M NaOH to reach the end point. What is the molar mass of the unknown?
Equal volume of 0.220 M AgNO3 and 0.140 M ZnCl2 solution are mixed. calculate the equilibrium concentration of Ag+ and Zn2+
What hormone is produced to make your liver a net producer of glucose? How does this hormone regulate glycogen phosphorylase and glycogen synthetase
compound of carbon and oxygen contains 3.00g of carbon and 8.00g of oxygen, what is the mass percent of carbon in the compound?
the initial volume of a gas cylinder is 750.0 ml. if the pressure of a gas inside the cylinder changes from 840.0 mmhg
How many grams of dry NH4Cl need to be added to 2.00 of a 0.100 M solution of ammonia, , to prepare a buffer solution that has a of 8.64? Ka for ammonia is 1.8*10^-5.
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