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A solution is found to be 4.33% Ethanol by mass CH3CH2OH. How many grams of ethanol are in 1 liter of this solution? What is the molarity of this solution?
What is the wavelength in micrometers of a photon emitted from a Hydrogen electron relaxing from the
The reactant concentration in a first-order reaction was 8.20×10?2M after 10.0s and 6.10×10?3M after 90.0s. What is the rate constant for this reaction
describe the molecular geometry of formic acid in terms of hybrid orbitals,bond angles and sigma and pi bond, and how many lone pairs are in the molecule.
Compare and describe the 2 different definitions of acids and bases. Explain the difference between a weak acid and a stronge one
Iodine-131 is administered orally in the form of NaI(aq) as a treatment for thyroid cancer. The half-life of iodine-131 is 8.04 days. If you begin with 49.8 mg of this isotope, what mass remains after 13.4 days have passed
How many mL of 1.74 M HCl solution can react with 71.5 g calcium carbonate? CaCO3(s) + 2 HCl(aq) ? CaCl2(aq) + H2O(l) + CO2(g)?
When ethanol burns C2H5OH + 3O2 ==> 2CO2 + 3H2O , how many moles of water are produced as 48.380 moles of carbon dioxide are produced.
How many grams of Na2EDTA·2 H2O (FM 372.23) should be mixed with 2.07 g of Ca(NO3)2·2 H2O (FM 200.12) in a 500 mL volumetric flask to give a buffer with pCa2+ = 9.00 at pH 9.00?
calculate the temperature change in the water upon complete melting of the ice. hint determine how much heat is
a sample of oxygen that occupies 1.00X 10^6 ml at 575 mm hg is subjected to a pressure of 1.25 atm. what will the final volume of the sample be if the temperature is held constant?
Give the equations representing the first and second dissociations of oxalic acid. Calculate the value of the first dissociation constant K1, for oxalic acid if the value of the second dissociation constant K2 is 6.40 x 10 ^-5
Calculate DE, and determine whether the process is endothermic or exothermic for the following cases: A system releases 29 kJ of heat to the surroundings and does 226 kJ of work on the surroundings.
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