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Calculate the ph at the equivalence point when 50 mL of .050 M HBrO is titrated with 0.100 M NaOH. Ka= 2.5 X 10^-9 for HBrO.
How many grams of lead chromate form when a 1.00-g sample of Pb(NO3)2 is added to 5.0 mL of 1.00 M K2CrO4 solution.
Calculate the value of the reaction quotient Q. (b) Is the system at equilibrium? If not, predict which way (right or left) the reaction will proceed to reach equilibrium.
An unknown metal m reacts with sulfur to form a compound with te formula M2S3. If 3.12g of m reacts with 2.88g of S, what are the names of M AND M2S3
A chemistry student needs to weigh out exactly 1.19 mol of Mg(HCO3)2 to perform a laboratory experiment. How many grams should he weigh out?
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.10mL of a 0.410\it M \rm HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
Air is approximately 80% nitrogen and 20% oxygen by volume, what is density of air at 273 K and 1 atmosphere? And at a altitude of 2550 ft would density of air be higher or lower, why
Battery acid is 35% sulfuric acid in water and has a density of 1.29g/ml. What is the mass of sulfuric acid in 1.00L of battery acid?
A rectangular block of plastic, measuring 1.34 cm by 2.27 cm by 1.39 cm, floats in the middle of the Pacific Ocean. The volume of sea water displaced by the plastic block is 3.35 cm3. Assuming the density of the sea water is 1.025 g/mL, what is th..
Give a specific example of an ideal-gas reaction for which the (a) equilibrium position is independent of pressure (b) the equilibrium position is independent of temperature
How many different tetrapeptides containing 2 molecules of alanine and 2 molecules of valine could theoretically exist?
Calculate the overall energy change in kilojoules per mole for the formation of CaCL(s) from the elements. The following data are needed: (a) Eea for CL(g) = -348.6kj/mol. (b) Ei1 for Ca(g) = +589.8kj/mol. (c) Ei2 for Ca(g) = +1145kj/mol.
The standard enthalpy of reaction, DH°rxn for C2H2(g) + 2 H2(g) ® C2H6(g) is -311.5 kJ mol-1. Determine the value of DE°rxn for this reaction
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