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The graph above shows the heating curve of water. Use this graph to answer the following question. How much heat is required to change 22 g of ice at -7.00oC (Celsius) to 22 g of steam at 108.0oC? spec. heat of H2O = 4.184 J/goC spec. heat of ice = 2.087 J/goC spec. heat of steam = 1.996 J/goC Heat of Fusion = 6.02 kJ/mol Heat of Vaporization = 40.7 kJ/mol 1 mol of water = 18.0g
If 2.50 g CuSO4 are dissolved in 8.0E2 mL of 0.25 M NH3, what are the concentrations of Cu2+, Cu(NH3)42+, and NH3 at equilibrium
When 414 J of heat is added to the gas, it expands and does 104 J of work on the surroundings. What is the value of delta H?
What volume of 1 M NaOH would you need to add to 200 mL of 0.2 M acetic acid solution to achieve a pH of 7.0 (the pKa of acetic acid is 4.76)? A)0.23 mL B)6.952 mL C)173.8 mL D)39.77 mL
When 85.0 g of CH4 are mixed with 160 g of O2 what is the maximum amount of CO2 that can be produced?
The wavelength corresponding to threshold frequency to tungsten surface is 230nm . Calculate the kinetic energy of the photoelectron ejected from the surface of tungsten metal.
A cylinder containing a mixture of N2 and O2 is taken from the basement to the top of a 50-story building. Assuming that the temperature remains constant, which of the following properties of the gas change during the ascent
Explain the significance of the chromic acid test. What would you observe in the case of a positive result? Do you expect 9-fluorenol to give a positive or negative result? What about the 9-fluorenone?
Calculate the de Broglie wavelength for each of the following. a) a proton with a velocity 95% of the speed of light. b) a 160 g ball with a velocity of 10. m/s
A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is -15.8°C and its pressure is 524 torr
A sample of oxygen that occupies 1.00x10^6mL at 575 mmHg is subjected to a pressure of 1.25 atm. What will the final volume of the sample be if the temperature is held constant?
Draw the para isomer produced when toluene reacts with \rm Br_2 in the presence of an iron(III) bromide catalyst
Describe the hybrid orbitals used by the central atom in O 3 .and also determines what is the number of sigma and pi bonds present in O 3 .
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