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If the percent yield for the following reaction is 65.0%, how many grams of KClO3 are needed to produce 16.0 g of O2?2 KClO3(s) 2 KCl(s) + 3 O2(g)
Buffers are typically made by combining a weak acid with its salt or by combining a weak base with its salt. Which of the following will be the other component present in a prepared buffer if one component was NH4Cl?
Benozoic Acid has a Ka = 6.3*10^-5. A 35.0mL sample of 0.130 M Benzoic Acid is titrated with 0.150M NaOH solution. Find the pH after 0.0mL NaOH is added.
a gas occupying a volume of 428 ml at a pressure of 0.970 atm is allowed to expand at constant temperature until its
A solution is prepared by condensing 4.00L of a gas, measured at 27°C and 746mmHg pressure into 58.0g of benzene. Calculate the freezing point of this solution.
compute the change in entropy of the universe if water vapor of one mol condenses to liquid water at the temperature of
How many grams of lead may be formed by the passage of 65.5 amps for 1.07 hours through an electrolytic cell that contains an aqueous Pb(IV) salt.
Assume that the literature value for the heat of neutralization of a strong acid and a srong base is -56 Kj/mol. Use the following hypothetical values of delta H to predict the value of delta H for the dissociation of the weak acid HA and the weak..
At 340 K, Kp = 69 for the reaction H2(g) + I2(g) ->2HI(g). 50.0 g of HI is injected into an evacuated 5.00-L rigid cylinder at 340 K. What is the total pressure inside the cylinder when the system comes to equilibrium?
A sealed balloon is filled with 2.20 L of helium at 23°C and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 210. torr and the temperature is -32°C. What is the change in volume of the balloon as it ascends from 1.00..
calculate the molality and molarity of an nh3 solution made up of 37.0 g of nh3 in 70.0 g of water. the density of the
Calculate the maximum mass in grams of H2S that can form when 155 g aluminum sulfide reacts with excess water according to: Al2S3 + H2O => Al(OH)3 + H2S [unbalanced]
During studies of the reaction below, 2 N2H4(l) + N2O4(l) ? 3 N2(g) + 4 H2O(g) a chemical engineer measured a less-than-expected yield of N2 and discovered that the following side reaction occurs
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