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2g KHP were added to a beaker with 25mL of water and a couple drops of phenophalein indicator and then was titrated with 8.1mL of NaOH until it turned pink. what is the concentration of NaOH?
what mass of calcium carbonate is required to react with 137.8 mL of a 0.6943 M sulfuric acid solution?
What pressure is exerted by 0.625-mole of a gas in a 45.4-L container at -24.0°C?
Calculate the root mean square speed of (a) Xe atoms and (b) He atoms at 298K. What si the root mean square of each of these at 500K?
How many moles of oxygen are needed to react with 5.0 moles of ammonia? In the above reaction, how many moles of water can be produced from 256 grams of oxygen?
Water (2290g ) is heated until it just begins to boil. If the water absorbs 4.99×10^5J of heat in the process, what was the initial temperature of the water.
weak base so you must consider other equilibria. (Ksp(ZnC2O4)=7.5X10^-9, Kb1=1.8X10^-10, Kb2=1.8X10^-13). Solve using systematic treatment of equilibrium.
Calculate the energy released when a 28.9 gram piece of copper is cooled from its melting point of 1083 degrees C to 25.0 degrees C. The specific heat of copper is .385 J/g degrees C.
The temperature of a 2.25 L sample of gas decreases from 35C to 20C. What is the new volume?
Observe significant figure rules. Constants: ideal gas const = R = 0.08206 L atm/mole K; 1 mole of gas at STP occupies 22.41 L. Atomic masses: H 1.008 O 16.000 g/mole. You must show work to identify the limiting reagent; no credit for guessing.
The compression ratio of today's cars is so much higher than in cars of years past. What is the major advantage of increasing the compression ratio?
What kind of compound is 2,3-dihydroxypentane? From what precursor do you synthesize the kind of compound that 2,3-dihydroxypentane is?
The gas effuses at a rate that is 0.404 times that of neon in the same apparatus under the same conditions. How many atoms are in a molecule of gaseous white phosphorus?
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