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a student prepared a solution of sodium chloride (NaCl) in distilled water by disolving 1.05g of NaCl in about 50mL of water. The mass of the final solution is 51.98g. determine the mass percent NaCl in the solution
Problem- Describe what is happening to an atom as it forms a cation in the gas phase. What factors determine how much energy is required to remove an electron
The recommended adult dose of Elixophyllin®, a drug used to treat asthma, is 6 mg/kg of body mass. Calculate the dose in milligrams for a 160-lb person.
A piece of magnesium with a mass of .2 grams is added to 50mL of 1 molarity of HCL at a temperature of 28 degrees celcius. When the magnesium disolves the solution reache a temperature 46 degrees celcius.
Draw the experimental outcome for a titration analysis involving a titrant and titrand (the pH vs. volume titrant added response curve), wherein the titrand is the weak, monoprotic base aniline (0.05000 F, 0.10000 L), and the titrant is a strong m..
The height of the mercury in the right arm open to atmospheric pressure (760 mmHg) is 100 mm and the height in the left arm is 120 mm. What is the pressure in the bulb
You made up a saturated solution of calcium sulfate(CaSO4). The Temperature is 25 degreescelcius. You then add 5.00 X 10-3 M sodium sulfate(Na2SO4). What are the concentrationsof calcium and sulfate after equilibrium is reached
How many grams of dry NH4Cl need to be added to 2.10L of a 0.500 M solution of ammonia, , to prepare a buffer solution that has a of 8.84? Kb for ammonia is 1.8*10^-5.
A certain substance has a heat of vaporization of 44.01 kJ/mol. At what Kelvin temperature will the vapor pressure be 4.50 times higher than it was at 289 K?
Explain what is the formula for the complex formed from chromium (III) four moles of water, as well as 2 moles of chloride?[Cr(H2O)4(Cl)2], [Cr(H2O)4(Cl)2]+, [Cr(H2O)4(Cl)2]+3
Determine the enthalpy for the given reaction as CS2
15.0mL of 0.50 HCl is added to a 100.0mL sample of 0.200 M HNO2. What is the equilibrium concentration of NO2. ions. (Ka for HNO2= 4.0 x 10^-4)
A 10.0 mL sample of aqueous H2SO4 requires 24.32 mL of 0.134 M NaOH to reach the endpoint. What is the molar concentration of H2SO4. First write the equation for the reaction.
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