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A 2.84g sample of an aqueous ionic salt with a molar mass of 99.37g/mol is added to a calorimeter (Ccal= 72.1J/°C) containing 74.61g of deionized water. The water is initially at 25.780C, after adding the ionic salt, the system reaches equilibrium at a temperature of 22.830C.What is the molar enthalpy of the salt solution in kJ/mol?
Write equations for the ionization of the following acids. Which ones ionize only slightly?
Using a sample of 0.385 g of Alka-Seltzer, the mass of Carbon dioxide is found to be 0.122 gram. Compute and enter response (in numerical value only) to three significant figures.
Give an example of a compound that exhibits ionic bonding and an example of a compound that exhibits a covalent bond.
in one experiment 22.9841 grams of 75.25 pure pbno32 pure pbno32 has amolar mass of 331.2 grams was mixed with 51.2354
A 0.375 gram sample of impure BaCl2?2H2O is titrated with 0.100M AgNO3, requiring 28.44 mL. Calculate (a) the percent BaCl2?2H2O in the sample and (b) the percent Cl- in the sample.
What is the pH when enough 0.100 base is added to neutralize 8.00 mL of 0.100 M acid? Note: Make simplifying assumptions
Which one of the following pairs is a conjugate acid-base pair?
calculate the expansion work done when 3.7 moles of ethanonl are converted to vapor at it's boiling point (78.3 degrees C) and 1.0 atm
What would the pH change be if this same amount of 1.000 M HCl were put into a gallon of pure water?
Calculate the change in pH when 9.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in NH3(aq) and 0.100 M in NH4Cl(aq).
calculate the molecular mass of a solute with 8.02 grams of solute in 861 grams of water lower the freezing point to
Describe how to make a sodium formate (HCOONa)/ formic acid (HCOOH) buffer that has a pH of 4.77.
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