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In a st of blood samples taken from a patient at different time the cholestrol level was tested as well as the final result was 256 mg/dL. Presuming tge distribution of these patients' cholesterol level measurements follows the Gaussian rule define what is the possibility that a sample contains the cholesterol level between 244 mg/dL ans 275 mg/Dl
The concentration of Mg2+ in seawater is 0.052 M. At what pH will 74% of the Mg2+ be precipitated as the hydroxide salt? [Ksp for Mg(OH)2 = 8.9* 10-12.]
If each mole of gas occupies 55 L under the conditions of the explosion, how many liters of gas are produced? c) how many grams of N2 is produced in the detonation?
when 25.0 ml of 0.500m h2so4 is added to 25.0ml of 1.00m koh in a coffee cup calorimeter at 23.5 degrees cel the
How much of a 12.0 M HNO3 solution should you use to make 850.0 ml of a 0.250M HNO3 soution? C) How much of a 5.0 M sucrose solution should you use to make 85.0 ml of a 0.040 M solution?
Consider the following ions: NH^4+, CO3^2-,Br^-,S^2-,ClO4^- A. Which of these ions in water gives an acidic solution B. Which of these ions will have no effect on the pH of an aqueous solution C. Which ion is the strongest base
An aqueous solution of sodium hydroxide is standardized by titration with a 0.266 M solution of hydrobromic acid. If 17.4 mL of base are required to neutralize 28.4 mL of the acid, what is the molarity of the sodium hydroxide solution
A convinced substance has a heat of vaporization of 64.01 kJ/ mol. Explain at what Kelvin temperature will the vapor pressure be 8.00 times higher than it was at 287 K
If the spin of one electron in an orbital is counterclockwise, what is the spin of the other electron in that orbital. Both clockwise and counterclockwise
Define what is the minimum frequency of light necessary to emit electrons from sodium via the photoelectric effect
A 250.0 gram metal bar requires 5.866kJ to change its temperature from 22.0C to 100.0C. What is the specific heat of the metal
Which of the characteristics has is NOT found in Peptidoglycan? A) The "peptido" parts of Peptidoglycan are peptide crosslinking sections that covalently bind the Petidoglycan strands together
Suppose you have a stoppered ?ask containing CO2 gas at room temperature and pressure. If the volume of your stoppered ?ask is 300.0 mL, the pressure in the room is 770 mm Hg, and the temperature in your work area is 22.0°C, how many moles of CO2 ..
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