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Draw the structure of predominant form of Nexium at pH 1.5,7.0,12.0 with three resonance structures at pH 12.
Define the metabolism of on glycerol trioleate, C51 H93 O6, a common fat, produces 3.022*10^4kj of heat. Explain how many grams of the fat must be burned to increase the temperature of 50g of water from 25 degrees Celsius to 30 degrees Celsius
Calculate the number of grams of HC2H3O2 needed to make 450 mL of 0.322 M solution.
Activating effects question: Using resonance contributors, explain why the nitrile group is a deactivator and a meta director in electrophilic aromatic substitution. A drawing would be helpful too.
A buffer that contains 0.511 M of a base, B and 0.897 M of its conjugate acid BH+, has a pH of 9.79. What is the pH after 0.00514 mol of HCl are added to 0.593 L of the solution
Construct a table that shows the relationship among the group number, valence electrons lost or gained and the formula metallic and nonmetallic elements- Na Ca Al N S Br
STP corresponded to conditions of "standard" temperature (T=0°C) and standard pressure (p= 1 atm). At STP, 1 L of Br2 reacts totally with 3 L of F2 to form 2 L of a product. What is the formula of the product?
The atmospheric activity of 14 C is 15 cpm/gC (counts per minute per gram of carbon). Assume that the cloth was made in the year 24 B.C. The half-life of 14 C is 5730 years. What will be the expected activity of 14 C of this sample
how heavy in pounds is a gold bar at Fort Knox (dimensions of 7.0 in x 3 5/8 in x 1 3/4 inches? If the current price for gold is $1400 per troy ounce, how much is 1 bar of gold worth in ? (make sure you look up troy ounce!)
The mass of the Earth's Moon is 7.35 x 10^22 kg. what is the mass expressed in megagrams , Mg?
X-ray Diffraction Methods 1. A particular crystal has a set of parallel layers at a d-spacing of 8.50 Å. At what angle does the X-ray beam have to be placed to obtain a diffraction peak using copper Kα radiation (1.542 Å).
Discuss why potassium cyanide, in terms of solubility, makes it such a dangerous substance.
Question- You needs to produce a buffer solution that has a pH of 5.26. You already have a solution that contains 10. mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this..
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