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How would you make 100ml of a buffer with a pH =4.25, starting with 0.25 M acetic acid and 0.25M sodium acetate
From this statement alone, can you conclude that the solution is acidic? If not, what additional information would you need
What volume of H2 gas (in L ), measured at 742 mmHg and 84C, is required to synthesize 25.8g of CH3OH ?
.05 moles of PCl5 and 5 moles of PCl3 are introduced into an evacuated 1L chamber. Calculate the equilibrium concentration of PCl3 knowing that K=33.3
a carboxylic acid reacts with water to form a carboxylic ion and H3O+ complete the following reaction
A gas occupies 22.4 L at STP and 14.5L at 100 C and 2.00 atm pressure. how many moles of gas did the system gain or lose?
Bauxite, the principle ore used in the production of aluminum cans, has a molecular formula of Al2O3•2H2O. (a) Determine the molar mass of bauxite. (b) How many grams of Al are in 0.58 moles of bauxite?
Calcium carbonate CaCO3 reacts with stomach acid HCL according to the following equation: CaCO3 + HCl --- CaCl2 + H2O + CO2. Tums, antacid, contains CaCO3. If tums is added to 20.0 mL of 4.00M HCl, How many grams of CO2 gas are produced.
Calculate the molarity and the molality of an NH3 solution made up of 37.5 g of NH3 in 70.0 g of water. The density of the solution is 0.982 g/mL.
Rubidium has two naturally occurring isotopes: Rb-85 with mass 84.9118 amu and a natural abundance of 72.17%, and Rb-87 with mass 86.9092 amu and a natural abundance of 27.83%.
Calculate the force of attraction between a cation with a valence of +2 and an anion with a valence of -2, the centers
Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 3.0 10-6) by 0.200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added.
Find the percent by mass of sodium chloride in a 1.25M NACL solution. The density of the solution is 1.06g/ml.
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