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Safrole is a topical antiseptic. Calculate the mole fraction ethanol in a solution prepared by dissolving 5.3mol of safrole in 950g of ethanol (MW=46.07 g/mol.)
the air in the laboratory was measured with a barometer to be 7.20 x 10 squared mm Hg. what is the laboratory air pressure in atm.
1- [Fe(H2O)6] 3+ is strongly paramagnetic whereas [Fe(CN)6] 3- is weakly paramagnetic. 2-What happens when H3PO3 is heated? 3-What is the basicity of H3PO4?
A reaction has a rate constant of 1.26x10-4/s at 26 degrees Celsius and 0.234/s at 76 degrees Celsius- find out the activation barrier for the reaction
If 20.0 mL of 0.12 M cobalt(II) nitrate is reacted with 15.13 mL of 0.097 M sodium phosphate, which of the two reactants will be left over and which will be completely consumed.
which indicator is more accurate phenopthalein or methyl orange? why
1. Using average bond enthalpies, predict which of the following reactions will be most exothermic:
What is the minimum volume of boiling water needed to dissolve 200mg of phenacetin, which has a solubility of 0.076 in cold water and 1.22 in boiling water
Give the common name for the following compound: 2,2-dimethyloct-3-yne CH3-C?C-CH2-CH2-CH2-CH3
The mixture of hot iron and aluminium is dropped into a beaker containing 100 g of water at 15 oC. What is the final temperature of the liquid water
Calculate the potential developed by a voltaic cell using the following reaction if all dissolved species are 0.025 M: 2 Fe2+ (aq) + H2O2 (aq) + 2 H+ (aq) ? 2 Fe3+ (aq) + 2 H2O (l)
The retina of a human eye can detect light when radiant energy incident on it is at least 4.0 x 10^-17 j. For light of 600 nm wavelength, how many photons does this correspond to
Calculate the molarity of Fe(scb)2+ for solutions 1-5. Absorbance 1=0.77 2= 0.100 3=0.181 4=0.297 and 5= 0.397.
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