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What are the 3 major changes in human evolution, bipedalism, brain expansion, and culture. Consider the specific anatomical changes of bipedalism and brain structure and discuss specific aspects of culture itself. What makes us human and how natural selection was involved in our ultimate design.
At equilibrium, the concentration of [H2]= 0.6 M. What is the EQUILIBRIUM concentration for [H2],[I2]and [HI]? H2(g) + I2(g) 2 HI(g) [HI] =
A hypothetical weak acid, HA, ws combined wih NaOH in he following proporions: .2 mol of HA, .08 ml of NaOH. The mixture was diluted o a total volume of 1.0 L and the pH measured. a) if pH= 4.80, what is the pKa of the acid
Calculate the osmotic pressure of a solution that contains 0.151 g of sucrose (MW = 342g/mol) dissolved in 367 g of water at 21?C.You may assume that the density of the solutionis essentially that of pure water.Answer in units of torr.
An aqueous solution is 30.0 % by mass ammonia, NH3, and has a density of 0.892 g/mL.The mole fraction of ammonia in the solution is?
Problem- Is an aqueous solution that is 0.0500 M in HCLO and 0.0200M in NaCLO a buffer solution and why?
If you have 100mL of 0.1 M acetic acid, pKa 4.7. How much 0.2 M NaOH solution would be needed to fully neutralize the acetic acid
how much energy is required to vaporize 98.6 g of ethanol at its boiling point if its Hvap is 40.5 kj/ mol ?
That of Al is higher than that of Mg for the reason that Mg wants to lose the second electron, so it is easier to take the second electron away.
1. A gas absorbs 10.0 J of heat and then performs 77.0 J of work. What is the change in internal energy of the gas?
A 5.0 g sample of NaCl is added to a Styrofoam cup of water, and the change in water temperature is 4.5 degrees C The heat of solution of NaCl is 3.76 kJ/mol.
Would you expect Cl2O7 to be more reactive toward H+(aq) or OH- (aq)? Explain. If the oxygen in Cl2O7 is considered to have the -2 oxidation state, what is the oxidation state of the Cl? What is the electron configuration of Cl in this oxidation st..
Calculate the % atom economy for the following two methods for converting benzene, C6H6, to aniline, C6H5NH2. Method 1: C6H6 + (CH3)3SiN3 + 2 F3CSO3H + NaOH
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