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The bodies of adult humans are composed of 55-60% water. How does the water help us to disperse heat and regulate body temperatures?
a 54.0 g ice cube initially at 0degc is dropped into a styrofoam cup containing 375 g of water initially at 21.2degc.
Determine the theatrical yield if 1.56 grams of hydrogen is permitted to combines with 9.70 grams of nitrogen producing 1.43 grams of ammonia?
A study of the water-gas shift reaction given below was made in which equilibrium was reached with [CO] = [H2O] = [H2] = 0.10 M and [CO2] = 0.31 M. After 0.41 mol H2 is added to the 2.0 L container and equilibrium is reestablished
If 0.25 mol of Br2 and .55 mol of Cl2 are introduced to a 3.0 L container at 400K, what will be the equilibrium concentration of Br2?
What is the freezing point of a solution prepared by dissolving 39g of benzene (C6H6) in 500g of cyclohexane. Fp for cyclohexane is 6.6 C Kf=20.0 C/m.
Problem- Calculate the pH of 1.00 L of a buffer that is 0.120 M HNO2 and 0.150 M NaNO2 before and after the addition of 1.00 ml if 12.0 M HCL(aq)
what is the mass in grams of A) 6.21 mol of KBr B) 10.2 mmol of PbO C) 4.92 mol of MgSO4 d) 12.8 mmol of Fe(NH4)2(SO)4 6H2)
A cylinder with a piston contains 897 ml of dry oxygen at a pressure of 582 mm Hg and a temperature of 327 K. If the temperature is reduced to 286 K and the pressure increased to 628 mm Hg what is the new volume ?
Problem- A piston is expanded from 52.3 L to 56.0 L against an external pressure of 2.5 atm, and absorbs 0.347 kJ of heat in the process. Calculate the change in internal energy for the system.
A gas mixture composed of helium and argon has a density of 0.727g/L at a 755mmHg and 298K .What is the composition of the mixture by volume?
How many peaks would you expect to see in the decoupled 13C spectrum of 4-chlorohept-1,6-diene?
If you were to explain the field of microbiology to a high school student, how would you describe it? What is the field of microbiology all about?
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