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A 102.5 g sample of metal beads was heated in a water bath to 99.5 degrees celcius. The metal was then added to a sample of water (25.7 g) and the temperature of the water changed from an initial temperature of 20 degrees celcius to a final temperature of 41.5 degrees celcius. What was the temperature of the metal at equilibrium? What was the temperature change of the metal? Calculate the specific heat and the atomic mass of the metal. What is the metal?
Octane has a density of 0.692 g/mL at 20 degrees Celsius. How many grams of O2 are required to burn 1.00 gal of C8H18?
0.038 moles of O2 are collected after the reaction of 78.2 mL of 4.6 M solution of H2O2. The density of the solution is 1.4 g/mL. What is the percent yield
An aqueous solution is 28.0% by mass ethanol, CH3CH2OH, and has a density of .957 g/mL. What is the molality of ethanol in the solution
20.00 ml of .150 M HC2H2O2 solution is titrated with .150 M NaOH. What is the pH at the equivalence point? Ka of HC2H2O2 = 1.8*10^-5.
The concentration of Al and Na in a sample of riverwater are 0.050 mg/kg and 5.2 mg/kg respectively. Express concentrations in molality of both Al and Na
To this was added 20.0 ml of DI water making to the total volume 30.0 ml. The concetration of the unknown acid was 0.868 M. What was the concentration of the original acid?
A 0.20M of acetic acid, CH3COOH, at a temperature of 25degC has pH of 2.73. Calculate the hydrogen ion concentration
what is the ph of a solution formed when 100 ml of a base with ph off 13 is diluted to 1 liter with pure water?
reaction begins only after a collision between the reactants. So this is an endothermic reaction, and most reactions occur when two reactants collide with each other.
what is the entropy change for freezing 4.25 g of c2h5oh at 158.7 k? h -4600 jmol.answer in units of
A particulate water sample that is saturated in CaF2 has a Ca2+ content of 105 ppm (that is, 105 g Ca2+ per 10^6 g of water sample).
question 1. if 0.015 m nacl shows conductivity of 12000 unites based on total ion concentration what conductivity
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