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Define the effect that van der Waals forces have in folding of globular proteins. Explain what sort of structures can be affected by van der Waals forces? Explain how would proteins fold differently in a world without van derWaals forces?
If the final temperature of the system is 59.4 oC, what is the calorimeter constant (Ccalorimeter) ? Use 4.184 J/goC for the heat capacity of water.
A 12 kg block of ice has a temperature of -10.0 degrees celsius. The pressure is one atmosphere. The block absorbs 4.50 times 10 to the sixth power J of heat. What is the final temperature of the liquid water?
An enclosure of volume 0.398 L has a partial pressure of O2 of 3.50 10-6 torr at 30.°C. What mass of magnesium will react according to the following equation. 2 Mg(s) + O2(g) → 2 MgO(s)
Given that the partial pressure of O2 in the atmosphere is 0.20 atm and the concentration of H3O+ is 2.0 x 10-6 M, determine the half-cell potential for the reduction of O2 according to the reaction: O2 + 4 H3O+ + 4 e- ? 6 H2O E° = 1.229 V
To aid in the prevention of tooth decay, it is recommend that drinking water contain 0.90 ppm fluoride (F-). (a) How many grams of F- must be added to a cylindrical water reservior having a diameter of 5.20 x 102 m and a depth of 47.11 m
which is a base that has a pKb=5.9 and FW= 121.1g/mole 1) what mass of A do you need? 2) what type of reagent do u need to add? 3) what ratio of the base to its conjugate acid is present in the final buffer
canned tuna was analyzed by the Kjeldahl method; 22.66ml of .1224M HCl were required to titrate the liberated ammonia. Calculate the percentage of nitrogen in the sample.
Determine the reaction, Fe2O3 + 6 HCl => 2 FeCl3 + 3 H2O. Explain how many moles of H2O will be made from 42.9 grams of HCl
Explain the electron configuration of B is 1s2, 2s2, 2p1 if each core electron that is the 1s electrons were entirely effective in shielding the valance electrons that is 2p and 2s electrons from the nucleus also the valence electrons did not shie..
Calcium carbide is an intermediate in the manufacture of acetylene. (Calcium carbide was also used for years in mining lamps.) Its chemical formula is CaC2. What is the bond order of the C22- ion
Deduce the numerical value of x in the formula Mo(CO)x. Explain the rationale for your chosen value of x. (Hint: consider electron pairs and bonding opportunities.)
The volume of a helium balloon is 75.4m^3 (or 7.54x10^L) at 20 degrees Celsius and 1.00 atm. (a) What is the mass of the helium gas in the balloon
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