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1) In doing the Calorimetry experiment, a student did not follow the directions exactly. How would the experiment be affected if no plot of temperature was carried out. Instead the student used the value of the water just after mixing with the metal as the maximum temperature.
2) A 102.5g sample of metal beads was heated in a water bath to 99.5deg.C.The metal was then added to a sample of water (25.7g) and the temperature of the water changed from an initial temperature to 20.0deg.C to a final temp. of 41.deg. C. (A.) What was the temperature of the metal at equilibrium? (B.) Calculate the specific heat and the atomic mass of the metal. What is the metal?
A sample of MgCl2 is known to be contaminated with NaCl. A 3.47-g portion of the sample is dissolved in water and treated with an excess of AgNO3 solution.
Calculate the molarity of 736 mL of a solution that contains 153 g of sucrose C12H22O11.
A gaseous compound is 78.14 percent boron and 21 86 percent hydrogen . At 27 degrees celcius, 74.3 ml of gas exerted a pressure of 1.12 atm.
In the reaction BaCO3 + 2HNO3 -> Ba(NO3)2+CO2+H2O, what mass of Ba(NO3)2 can be formed by combining 55g BaCO3 and 26g HNO3?
The original volume is 70. cm3. If the combustion of this mixture releases 855 J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion is converted into work to push back the pisto..
A sample of helium effuses through a porous container 6.5 times faster than does unknown gas X?
One way to isolate metals from their ores is to react the metal oxide with carbon as shown in the following reaction: 2MO(s) + C(s) → 2M(s) + CO2(g)
If 1.0 l of 0.10 M sodium phosphate is mixed with 1.0 l of 0.10 M magnesium nitrate, magnesium phosphate is produced. Calculate the concentration of each ion when the reaction is finished and the mass of precipitate.
The most stable form of bromine under standard conditions is as the diatomic molecule
C2H4 + 3O2 = 2CO2 + 2H2O if you start with 45 grams of ethylene (C2H4), how many grams of carbon dioxide will be produced.
When 28.6 kg of Fe2O3 react with 17.2 kg of CO and 6.3 kg of Fe are recovered, what is the percent yield for the reaction?
1) The standard potential of the cell Ag(s)|AgCl(s)\\Cl-(aq)||Ag (aq)|Ag(s) is 0.58 V at 25 °C. Calculate the equilibrium constant for the cell reaction.
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