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A multivitamin tablet contains 40 milligrams of potassium. How many moles of potassium does each tablet contain?
Cortisol ( M=362.47g/mol); Corisol is 69.6% C, 8.34% H, 22.1% O by mass. What are the empirical and molecular formula?
What are the major differences between "theories", "hypotheses" and "laws". What is an example that would explain them.
When 6.533 g of silver nitrate reacts with excess aluminum, how many grams of silver metal and aluminum nitrate forms?
What is the value of Delta S when 2.7g of CH4 is compressed from 29.0 L to 18.0 L at a constant temperature of 100 C?
The pH at one half the equivalence point in an acid-base titration was found to be 5.73. What is the value of Ka for this unknown acid?
Explain the use of nuclear isotope in medical field and Write a paragraph expaining what nuclear isotope can be used for medical purpose
Distance between two consecutive peaks or troughs. Frequency () Number of waves per second that pass through a given point in space. How are frequency and wavelength related? Example: Are gamma rays ( = 10-12 m) a form of high or low frequency rad..
Carbon disulfide, CS2, is a volatile, flammable liquid. It has a vapor pressure of 400.0 mmHg at 28.0°C and 760.0 mmHg at 46.5°C. What is the heat of vaporization of this substance?
Work out the solubility of copper(II)sulfide. Take it that 1 litre of the mixture weighs 1 kg. (in g/100g), CuS (s) Cu^2+ (aq) + S^2- (aq)
Give a detailed mechanism for the nitration of bromobenzene . As part of your answer explain the regiospecificity
Which of the following molecules have dipole moments? For the molecules that are polar, indicate the polarity of each bond and the direction of the net dipole moment of the molecule.
what is the energy difference between the heats of formation you calculated for carbocation A and B?
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