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Predict the sign of delta S for each of the following changes.
b. N2(g) +3H2(g)->2NH3(g)c. NaCl(s)->Na+(aq)+Cl-(aq)d. NaCl(s)->NaCl(l)
The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 × 10-3, Ka2 = 6.2 × 10-8, 25) and Ka3 = 4.2 × 10-13 at 25.0 °C.
when a clean iron nail is placed in an aqueous solution of copper(ll) sulfate, the nail becomes coated with a brownish black material.
A sample of propane,C3H8, contains 10.8 moles of carbon atoms. How many total moles of atoms does the sample contain?
What volumes of CO2 and NH3 at 201 atm and 450.°C are needed to produce 2.54 kg of urea, assuming the reaction goes to completion?
What mass of NaOH is needed to precipitate the Cd^{2+} ions from 32.0 mL of 0.480 M Cd(NO3)2 solution?
if all the ice cream calories were to be butned off how long would it take him? i got 45 minutes?
Determine the partial pressure of Ar, argon gas in the flask and A flask is filled with 1.20 of argon Ar gas at the temperature of twenty five degree Celsius.
when 50.0 g of Copper are reacted with silver nitrate solution Cu + 2AgNo3 - Cu(No3)2 +2 Ag 148 g of silver are obtained. what is the percent yeild of silver obtained?
For a given sample of {rm CH_3OH}, the enthalpy change on reaction is 19.0 kJ. How many grams of hydrogen gas are produced?
A sample of neon gas used in a neon sign occupies a volume of 1.70 L at a pressure of 580 torr. Calculate the volume of the gas if the pressure in the glass tube of the sign is 781 torr.
A zero-order reaction has a constant rate of 2.40×10-4 M/rm s. If after 80.0 seconds the concentration has dropped to 7.00×10-2 M,
Heptane can appear harmless, but when ignited, it explodes violently. What is the first law of thermodynamic?
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