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A compound has a molar mass of 171.6g/mol and contains 55.94% oxygen atoms by mass. How many oxygen atoms are in each molecule of this compound?
Analysis of an unknown solution produces absorbance values of: 0.45 @ lambda max for B 0.75 @ lambda max for A What is the molar concentration of the unknown
Pressure and temperature remain constant. What is the new voume if 0.500 mole O2 gas is added?
Calculate the mass of sugar (C12H22O11) that must be dissolved in 700 g of water to prepare 20% sugar solution
How much energy is required to vaporize 48.7 g of dichloromethane (CH2Cl2) at its boiling point, if its ?Hvap is 31.6 kJ/mol?
Calculate the [SCN] solution A, where 5.3 mL of 1.9x10^-3 M NaSCN is diluted to 42.0 mL with 0.1 M Fe(NO3)3. Next calculate the [FeSCN2+] in the solutions prepared by diluting volumes of solution A with 0.1 M Fe(NO3)3 to a final volume of 1.0101 mL..
In the following conditions calculate the moles of hydrogen and the pressure in each flask where the volume is negligible. Each flask is originally 275K with .455 mols of hydrogen gas and .7atm of pressure. Then one flask is heated to 500K while t..
use electron configurations to rationalize the octet cule. show how it works with covalent and ionic bonds
Calculate the vapor pressure of a solution containing 27.5 g of camphor (C10H16O) dissolved in 94.4 g of benzene.
Conversion of aqueous formaldehyde to methylene glycol? Assuming that you have formaldehyde, CH2O, fully solubilized in water at a temperature of 200 degrees F, is the first order and natural reaction
The total precipitate was dissolved in HCl + HNO3. When the solution thus formed was treated with excess NaOH followed by H2O2, a colorless solution and a reddish brown precipitate were formed. The precipitate was found to be soluble in HCl, H2SO4..
Nitration of chlorobenzene (C6H5Cl) occurs- faster than nitration of benzene and gives a mixture containing mostly o-and p-chlorobenzene
tryptophan in the environment was exhausted, the bacteria started to excrete a metabolite on the tryptophan biosynthetic pathway. why didnt the bacteria excrete the metabolite before exhausting the environmental tryptophan?
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