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(a) Use the Henderson and Hasselbalch equation to calculate the pH of a buffer solution that is 0.45 M in NH4Cl and 0.15 M in NH3
(b)How would you prepare an NH4Cl%u2013NH3 buffer that has a pH of 9.00?
What mass of zinc oxide can be produced from the reaction of 415 g zinc sulfide with 265 g of oxygen gas? The other product is sulfur dioxide.
How many grams of N2 are required to react with 2.30 moles of Mg in the following process?
It takes 48.0J to raise the temperature of an 9.60g piece of unknown metal from 13.0c to 24.0. What is the specific heat for the metal? Express your answer numerically, in J/g.C
What is the chemical make-up of natural cleaners? How do these products compare to traditional cleaners? Are the active ingredients the same or different?
8.20 grams of solute in 861 grams of water lower the freezing point to -0.430 degree celsius calculate the molecular mass of the nonionic solutes.
sample containing 4.80 g O2 of gas has a volume of 15.0 L. Pressure and temperature remain constant. What is the new voume if 0.500 mole O2 gas is added?
Give the structure for an isomer of compound A that has a melting point that is appreciably different from that of A yet NMR spectra that are almost identical to those of A. Include wedge/dash bonds.
Calculate the pressure inside the graduated cylinder it the height of the water is 5mm higher than the water in the trough. The atmospheric pressure is 760 mm Hg
What volume of .250 M calcium chloride would be required to precipitate silver chloride if it is mixed with 600.0 ml of 0.650 M Silver nitrate.
How many grams of commercial acetic acid (97% by mass) must be allowed to react with an excess of to produce 83 of acetyl chloride , if the reaction has a 81.2 yield?
how many milliliters of .45M hydrochloric acid must be added to 25.0 mL of 1.00 M potassium hydroxide to make a neutral solution?
Phosphorus-32 has a half-life of 14.0days . Starting with 4.00 g of 32p , how many grams will remain after 42.0 days?
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