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If your lab partner added slightly too much water in step 5 of preparing the penny solution, but then removed the excess water with a pipet before shaking the volumetric flask, will your final percentage of copper in the penny be too big, too small, or unchanged? clearly explain your answer.
a sample of gas occupies 15.0 liters at 4.00 atmospheres and 300 k. what is the new volume of the gas if pressure is
Calculate the pH of the following solutions A) 0.10 M hydrogen sulfide? B) 1.0*10^-4 M benzoic acid (check Ca/Ka ratio)? C) 0.09 M methylamine
The concentration of SO42- (aq) in a sample of river water can be determined using a precipitation titration in which a salt of Ba+ (aq) is the standard solution and BaSO4 (s) is the precipitate formed. What is the concentration of SO42- (aq) in a..
What is the enthalpy of reaction per mole of oxygen bound. The heat capacity of the solution may be assumed to be 4.18J/k cm3
Consider an insulated system containing 150 g of liquid water and 150 g of ice at equilibrium under atmospheric pressure. A total of 22 g of steam at 120±C is admitted to the system.
A 25:75 mixture of acetone:toluene is heated to 70 C at a pressure of 760 mmHg. What is the total vapor pressure of the system? Is the system a liquid below boiling, at boiling, or a gas?
At the temperature that both stages are operating at, the vapor pressure of A is 10 kPa and the vapor pressure of B is 100 kPa. The liquid and vapor phases leaving each unit are in equilibrium. Find the composition ..
Methanol (CH3OH) reacts with oxygen to produce carbon dioxide and water. How many grams of oxygen will be required to react completely with 200 grams of CH3OH? What mass of water will be produced during the reaction?
The thermochemical equation representing one process used for the synthesis of ammonia involves the equilibrium shown, N2(g) + 3 H2(g) 2 NH3(g) For this reaction, DH° = -92.2 kJ, DG° = -33.4 kJ. All things considered, one concludes that Question 1..
What is the gas pressure (in atm) inside a 1.89-L bulb that contains 1.56-g of Ne at a temperature of 21.1 C? Be sure to report the units as atm
What was the calculated PH value obtained for the reaction NH3 + HCl -› NH4Cl using the thermodynamic data NaOH (aq) + HCl (aq)--> H2O(l) +NaCl (aq) NaOH (aq) + NH4Cl(aq)---> NH3 + NaCl + H2O(l) NH4Cl 2M 20ml NH4OH 2M 10ml HCL 2M 20ml NaOH 2M 20ml
You are a laboratory assistant for your chemistry course. There are 250 students in the course, and each needs to use 25 mL of a 0.15 M solution of copper sulfate.
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