13 Answered Questions for the topic HW1

Hw1

04/28/18

chemistry 111
      H                                                   H    H-S-C-H ( C is 4 dots)                     H-C-S-H (S is 4 dots)        H                                                  H       ... more
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Hw1

04/10/18

HOMEWORK HELP
Question 1 The first line of a Works Cited entry:A. overhangs to the leftB. is indentedC. is flush with other lines in the entryD. is centered on the page Question 2: The list of Works Cited... more
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Hw1

04/04/18

homework problem
What is the velocity of an electron having a de Broglie wavelength that is approximately the length of a chemical bond? Assume this length to be 1.2*10–10m.
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Hw1

04/04/18

homework problem
The energy required to dislodge electrons from sodium metal via the photoelectric effect is 275 kJ/mol. What wavelength (in nm) of light has sufficient energy per photon to dislodge an electron... more
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Hw1

04/02/18

homework problem
The power available from a wind turbine is calculate by the following equation: P=1/2Apv^3 where P= powerI(watts), A= sweep area(circular) of the blades (square meters), p= air density (kg per... more
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Hw1

03/30/18

homework problem
A 3-kilogram [kg] projectile traveling at 100 meters per second [m/s] is stopped by being shot into an insulated tank containing 100 kilograms [kg] of water. If the kinetic energy of the projectile... more
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Hw1

03/26/18

homework problem
A "normal" blood pressure has a gauge pressure of 120 millimeters of mercury [mm Hg] (systolic reading) over 80 millimeters of mercury [mm Hg] (diastolic reading). Convert 120 millimeters of... more
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Hw1

03/26/18

homework problem
a noon on a clear day in midsummer, a cylindrical titanium plate is placed in the sun. The plate is painted flat black sio that it will absorb most of the energy from the sunlight raather than... more
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Hw1

03/25/18

homework problem
A 1.00 L flask is filled with 1.20 g of argon at 25 ∘C. A sample of ethane vapor is added to the same flask until the total pressure is 1.150 atm .Part AWhat is the partial pressure of argon, PAr,... more
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Hw1

03/23/18

chemistry problem
What mass of natural gas (CH4) must you burn to emit 271 kJ of heat? CH4(g)+2O2(g)→CO2(g)+2H2O(g)ΔH∘rxn=−802.3kJ m=?
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Hw1

03/23/18

CHEMISTRY 111
A piston has an external pressure of 8.00 atm. How much work has been done in joules if the cylinder goes from a volume of 0.160 liters to 0.510 liters?Express your answer with the appropriate... more
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Hw1

03/22/18

homework help
When 0.594 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.3 ∘C to 30.0 ∘C.Find ΔErxn for the combustion of biphenyl in kJ/mol biphenyl. The heat... more
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Hw1

02/23/18

CHEMISTRY 123
1.38 g H2 is allowed to react with 10.2 g N2, producing 2.35 g NH3.Part AWhat is the theoretical yield in grams for this reaction under the given conditions?Express your answer to three significant... more
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