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A buffer is prepared by adding 150 mL of 1.0 M NaOH to 250 mL of 1.0 M NaH2PO4. How many moles of HCl must be added to this buffer solution to change the pH by 0.18 units
A molecule of chlorine dioxide (ClO2) at 25oC has a velocity of 306 m/s. What is the kinetic energy in joules of the molecule at this temperature?
What characteristic absorption bands would you expect to find in the infrared spectrum of caffeine?
What volume of hydrogen gas is produced when 0.829 mol of iron reacts completely according to the following reaction at 0oC and 1 atm?
what is the ph solution obtained by mixing 25.00 ml of 0.250 ml HCl and 25.00ml of 0.125M NaOH
If 12.0 g of O2 is required to inflate a balloon to a certain size at 27 OC what mass of O2 is required to inflate it to the same size (and pressure) at 5.0 oC.
What pressure would have to be applied to steam at 365°C to condense the steam to liquid water (H vap = 40.7 kJ/mol)?
A running automobile produces CO at a rate of 188g CO per hour. A car is left idling in a garage 5.2m long, 4.0m wide, and 2.2 m high at 20 degrees C. How long would it take to build up a lethal concentration of CO of 1000 ppmv?
Using the values for the resonance energies of benzene and naphthalene given above, explain why Diels-Alder reactions of anthracene take place at the center ring, not one of the end rings.
Clausthalite is a mineral composed of lead selenide (PbSe). The mineral adopts a NaCl-type structure. The density of PbSe at 25C is 8.27g/cm^3.
In a Titration 33.21 mL 0.3020M rubidium hydroxide solution is required to exactly neutralize 20.00mL hydrofluoric acid solution. What is the molarity of the hydrofluoric acid solution?
Adipic acid can be prepared by the oxidation cleaveage of the CC double bond of cyclohexne. If you require 12.5g of adipic acid what volume of cyclohexene
The rate constant for a certain chemical reaction is. 0.0125 L mol^-1 s^-1 at 25 degree Celsius and 0.0125 L mol^-1 s^-1 at 50.0 Celsius. What is the activation energy for the reaction, expressed in kJ mol^-1
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