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Describe how to prepare BaSO4 by: a. an acid-base reaction b. a gas-forming reaction, and c. an oxidation-reduction reaction. The available starting materials are ZNCO3, HCl, Cl2, HNO3, Zn(OH)2, NaCl, ZN(NO3)2, and Zn. Write complete, balanced equations for the reactions chosen.
what is the average density of the sun in units of grams per cubic centimeter? The volume of a sphere is (4/3)?^3.
A 21.6 mL volume of 0.107 M NaOH solution, reaches the stoichiometric point in the titration of a 25.0 mL aliquot of nitrous acid, HNO2. What is the molar concentration of the HNO2 solution
Determine the concentrations of BaBr2, Ba2 , and Br- in a solution prepared by dissolving 1.62 × 10-4 g BaBr2 in 1.50 L of water.
At what pH will precipitation of Al(OH)3 begin if 5.40 lb of aluminum sulfate, Al2(SO4)3, is added to 1150 gallons of water (with a negligible change in volume)
A 70kg skier is going down a hill that is inclined at a 12 degree angle to the horizontal. the coefficient of kinetic friction between waxed skies and snow is .05. The force of the air resistance on the skier is 15.6N. find the skiers acceleration..
An increase in the temperature of the reactants causes an increase in the rate of reaction. The best explanation for this behavior is that as the temperature increases
A metal sample weighing 124.10 g and at a temperature of 99.3 C was placed in 42.87 g of water in a calorimeter at 23.9 C. At equilibrium the temperature of the water and metal was 41.6 C.
The mass of a golf ball is 45.9 g. If it leaves the tee with a speed of 61.0 m/s, what is its corresponding wavelength?
volume of 20.0 mL of a 0.190 M HNO3 solution is titrated with 0.550 M KOH. Calculate the volume of KOH required to reach the equivalence point.
A solid sample containing some Fe^2+ ion weighs 1.062 g. It requires 24.12 mL 0.01562 m KNno4 to titrate Fe^2+ in the dissolved sample to a pink end point
A piston has an external pressure of 11.0 atm . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.620 liters.
With which of the metals Cu(s), Al(s), Ag(s), Fe(s) and Zn(s) is reaction with H+(aq) ions to produce H2(g) a spontaneous reaction. Select three oxidizing agents that are capable of oxidizing Cl-(aq) ions to Cl2(g)
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