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For the following amino acids, indicate how they might interact to contribute to the tertiary or quaternary structure of a protein. choose from among the following: disulfide bond, salt bridge, hydrogen bonding or dispersion forces. A) glutamic acid and lysine B) tyrosine and lysine C) Ile and Ala D) two cysteines
How much heat in kilojoules is needed to bring 1.30 kg of water from 33.7 to 97.1 °C (comparable to making four cups of coffee)?
Calculate the mean and standard deviation of w/v percentage of acetic acid and the 95% confidence interval for the mean. Calcium in a mineral was analyzed five times by each of two methods
Determine What is the percent by mass of sodium phosphate in a 0.142M Na 3 PO 4 (aq) solution? If it is given that it has a density =1.015g/mol.
Concentrated HCl is 36.5% HCl by mass and has a density of 1.18 g/mL.What is the molality?What is the molarity?
What is the pH of a buffer prepared by adding 0.809 mol of the weak acid HA to 0.406 mol of NaA in 2.00L of solution? The dissociation constant of is 5.66*10-7
how many N2 molecules can be produced after the explosion of 2.37 kg of NH4NO3? (Molar mass of NH4NO3 is 80.06 g/mol.)
30.0 mL of water at 24.5 °C was mixed with 40.0 mL of water at 40.0 °C. If the specific heat of water is 4.184 J/g °C and no heat was absorbed by the calorimeter, then the final temperature is _____ °C. (Report to the proper number of significant ..
A solution is prepared by mixing 0.0300 mol CH2Cl2 and 0.0500 mol of CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor
How many grams of sucrose must be added to 552g of water to give a solution with a vapor pressure 2.o mmHg less than that of pure water at 20 celsius?
It takes 47 mL of 0.124 M KOH to neutralize 47.8 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? Answer in units of moles/liter
What max of water can be heated from 15 degrees C to 100 by burning this piece of cool
A 72.0 mL volume of 0.25 Moles HBr is titrated with 0.50 Moles KOH. Calculate the pH after addition of 36.0 mL of KOH
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