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If the hindenburg held 200000 m^3 of hydrogen gas at 23 degrees C and 1.0 atm, what mass of hydrogen was present
how many grams of Na2CO3 (FM 105.99) should be mixed with 5.00 g of NaHCO3 (FM 84.01) to produce 100ml of buffer with pH 10.00.
Calculate the solubility product constant for Pb(IO3)2 (4.3 x 10^-5 M), given that the molar concentration of saturated solution is as indicated in parenthesis.
What mathematical expresssion will yield the correct volume at 177 degrees celsius and 400mgHg?
A student studied the clock reaction described in this experiment. She set up Reaction Mixture 2 by mixing 20 mL of 0.010 M KI, 10 mL 0.001 M Na2S2O3, 10 mL 0.040 M KBrO3, and 10 mL 0.10 M HCl using the procedure given. It took about 45 seconds fo..
At room temperature 22.0 C the vapor pressure of benzene is 0.302 atm and the vapor pressure of hexane is 0.374 atm. What is the total vapor pressure at room temperature for a 2:1 mixture of hexane to benzene
A sample of vinegar has a freezing point depression of 2.0 degrees C. What is the estimated percent by mass of acetic acid in the vinegar? Molar mass of acetic acid is 60g/mol
a sample of Ringer's solution contains the following concentractions (mEq/L) of cations: Na 147, K 4 and Ca2 4. If CI- is the only anion in the solution,
A mixture of acetone and toluene is boiled at 60 C and at 760 mm Hg. What is the ratio of acetone to toluene in the vapor phase?
In an endothermic reaction, in going from the reactants to the products at the same temperature, the value of q is negative.
What is the molality of a 25.5% aqueous solution of phosphoric acid, H3PO4 (M = 97.99 g/mol)
Calculate the pH of a buffer made with 0.50M phosphoric acid and 0.75M sodium dihydrogenphosphate. Ka = 7.5 x 10-3.
In the titration of a solution of the extremely weak acid, HCN (Ka = 6.2 x 10-10), by a solution of sodium hydroxide of equal concentration,
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