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Use Henderson Hassalbalch equation to calculate how much HCl must be added to a liter of buffer that is 1.5 M in acetic acid and 0.75M in sodium acetate to result in a buffer pH of 4.10? Ka = 1.8 x 10-5
How is the ideal gas law modified to account for the finite volume of molecules? The temperature of the sea bed 60 m below the surface and at the surface are both 20C. A rubber balloon is inflated at the sea bed with 2.0 mole gas neglecting the wo..
Calculate the partial pressure of each gas in the container. Express the pressure values numerically in atmospheres, separated by commas.
What is the percent purity of the calcium hydroxide if the titration requires 7.81 mL of the acid to reach the endpoint?
5000 joules of energy are added to 108 grams of silver, Ag, at 20°C. What is the final temperature of the metal? (the specific heat of silver is 0.235)
calculate th eapproximate freezing points of the following aqueous solutions (assume complete dissociation) a. 0.800 m NaCl b. 0.800 m
A sample of calcium nitrate, Ca(NO3)2, with a formula weight of 164 g/mol, has 5.00 x 1025 atoms of oxygen. How many kilograms of Ca(NO3)2 are present
Determine the sign of ΔS sys and ΔS surr for each chemical reaction.2CO(g)+O 2 (g)?2CO 2 (g)ΔH ° rxn = -566.0 kJ. Choose from:
3H2 (g) + N2 (g) 2NH3(g), Kc = 6.0 × 10-2 at 500°C for this nitrogen fixation reaction. What is the equilibrium concentration of N2 If 0.250 M H2 and 0.050 M NH3 are present at equilibrium?
A coffee cup calorimeter is being used in this lab despite the fact that one of the reactions produces gas. Calculate the work done using the information
A solution of phosphoric acid was made by dissolving 10 g of H3PO4 in 100 ml of water. The resulting volume was 104 mL. Calculate the density, mole fraction, molarity, and molality of the solution. Assume water has a density of 1.00 g/cm3
When a mole of C2H4 is combusted it reacts with 3 moles of O2 to produce CO2 and H2O. How many moles of CO2 and how many moles of H2O are produced?
Four Cl- ions can act as ligands to form a complex ion with Cu2+. What is the overall charge of the complex ion?
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