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The starship is caught in a time warp and spock is forced to use a primative technique of the 20th century to determine the specific heat capacity of an unknown mineral. The 307g sample was heated to 98.7 degree C and placed into a calorimeter containing 72.4g of water at 23.6 degree C. The heat capacity of the calorimeter was 15.7J/K. The final temperature in the calorimeter was 32.4 degree C. What is the specific heat capacity of the mineral?
You are the Science Officer on the Starship Enterprise and you come across a new planet. You find that no light with wavelength less than about 650 nm reaches the surface of the planet.
Blood pH can be altered by changes in breathing. When a person is hyperventilating, they are breathing in rapid, deep breaths.
For the reaction given below at 700°C, Kc = 0.534. H2(g) + CO2(g) reverse reaction arrow H2O(g) + CO(g) Calculate the number of moles of H2 that are present at equilibrium
If it takes 526 J of energy to warm 7.40 grams of water by 17 degrees Celsius, how much energy would be needed to warm 7.40 grams of water by 55 degrees Celsius?
composition diagram to explain why fractional distillation of 2 components is more easily accomplished if the components have boiling points that differ by 20 C or more?
Assume that the only amino acid in a particular protein that absorbs at 280 nm is tryptophan, and that this particular protein has 2 moles of tryptophan per mole of protein.
Molecular iodine, I2 (g), dissociates into iodine atoms at 625 K with a first-order rate constant of 0.271 s-1. If you start with 5.2x10^-2 M I2 at this temp.
A particular coal contains 2.5% sulfur by mass. When this coal is burned, the sulfur is converted into sulfur dioxide gas.The sulfur dioxide reacts with solid calcium oxide to form solid calcium sulfite CaO(s)+SO2(g)?CaSO3(s),S(s)+O2(g)?SO2(g)
Calculate the weight of benzene codistilled with each gram of water and the percentage composition of the vapor produced during steam distillation.
Calculate delta S for the heating of 1 mole of SO2(g) from 75°C to 1350°C at a constant pressure of 1 bar.
A 29.0-g sample of water at 260. K is mixed with 51.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
How much heat is needed to convert 10.0 g of ice at -25.0ºC to water at 80.0ºC?
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