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A block of copper, mass at 500 grams and initially at T = 293 K is in thermal contact with an electric heater at a resistance 1.00 kiloOhms and negligible mass. A current of 1.00 A is passed for 15.0 seconds. How do you calculate the change in entropy of the copper, "taking the heat capacity at constant temperature = 24.4 J/K*mol"?
7.3 { mol} of helium are in a 18 { L} cylinder. The pressure gauge on the cylinder reads 67 {psi}. What are (a) the temperature of the gas in degrees Celsius and (b) the average kinetic energy of a helium atom in Joules
changes the freezing temperature of the camphor by -2.10°C. Given camphors freezing-point depression constant of -37.7°C/m, calculate the molar mass of estradiol.
Barium sulfate is used clinically to provide x-ray images of the digestive tract. How might barium sulfate be prepared in the laboratory from a double-displacement reaction of an ionic nitrate compound and sodium sulfate?
How much time (in minutes) will it take for the water heater to heat the 5.5 Liters of water from 23 Celsius to 49 Celsius?
silver metal may be precipitated from a solution of silver nitrate by placing a copper strip into the solution. what
If 21.3 mL of a 0.120M NaOH solution are required to neutralize 0.400 grams of an unknown monoprotic acid, what is the molecular mass of the acid
Use simple structure and bonding models to account for why carbon carbon single bonds in ethane rotate freely while carbon-carbon double bonds in ethene do not rotate.
Rank them in order of size from largest to smallest. In this diagram, A and B are different palindrome sequences on a DNA strand. Only the restriction enzyme that recognizes site B is present. Explain why only two fragments would be produced. How ..
Find the normal boiling point of a saturated solution of LiF at 100C, assuming it undergoes complete dissociation. The solubility of LiF is 230 mg/100 g of water at 100C
The total concentration of enzyme in the reaction was 10 mmol/mL. What is thekcat (K2) of this reaction?
The blue color of the sky is due to the scattering of sunlight by the molecules in the air. The blue light has a frequency of about 7.5 x 10^14 Hz.
Is it possible for a salt of formula AB3 to have a face-centered cubic unit cell of anions with cations in all the eight available holes. Explain.
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