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0.9 moles of an ideal gas with Cv = 3R/2, initially confined to a container of volume 6 litre and at a temperature 42 C, expand (or are compressed) against a constant external pressure of 1.2 atm until the final pressure of the gas is equal to the external pressure and the final temperature of the gas is equal to the temperature of the surroundings. During this process the system does 2,523 J of work on the surroundings. Calculate the change in entropy, Delta S, of the gas (in J / K).
The solubility of oxygen gas at 50*C is 27.8 mg/L at an oxygen pressure of 1.00 atm. The solubility of nitrogen gas at 50*C is 14.6 mg/L at a nitrogen pressure of 1.00 atm. Assume that the air above the water contains an oxygen partial pressure of..
Calculate the Total Cell Number, You are given a 500ml culture of Euglena from which a 1 ml sample is taken and put in 49 ml of water. Absorbance was measured on this sample but the reading was off the scale
A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0- L vessel at 300 K . The following equilibrium is established:
At a certain temperature, a volume of 100 mL of saturated barium carbonate solution contains 0.00216 g of BaCO3 (MW=197.3 g/mol).
How many grams of the solid can be formed from 286 grams of calcium nitrate and 136 grams of Phosphoric acid?
The overall Kf for complex ion Ag(NH3_x+ is 1.7 x 10^7. The Ksp for AgI is 1.5 x 10^-16. What is the molar solubilitiy of AgI in a solution that is 2.0 M in NH3?
What is the maximum number of electrons that can be freed by a burst of light of 405 nm whose total energy is 1.00μJ?? Given the minimum evergy of 4.41*10^-19 and a maximum kinetic energy 4.95*10^-20.
When 0.0500 mol of HCl is reacted with 0.0500 mol of NaOH in 50.0 mL of water, the temperature of the water increases by 13.7°C. Calculate the heat of the reaction for the following thermochemical equation
A compound decomposes by first order process. If 25% of the compound decomposes in 60 minutes, the half life of the compound is _ minutes
If 1L of .15M NaOH is unprotected from mmol of CO2, what will be its new molarity when it is standardized agains a standard solution of HCl using
A solution containing AgNO3 is mixed with a solution of NaCl to form a solution that is 0.10 M in AgNO3 and 0.075 M in NaCl. What will happen once these solutions are mixed. Ksp(AgCl) = 1.77 x 10^-10
A liquid fuel mixture contains 28.25% hexane, 14.05% heptane, and the rest octane. What maximum mass of carbon dioxide is produced by the complete combustion of 12.0kg of this fuel mixture
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