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The of the Sun is constantly interacting with gamma rays and neutral particles that move towards us in the interstellar medium (deep space).
Whats the melting point would be if you mixed acetanilide with 10 % by weight of naphthalene(acetanilide mp 113.5-114; naphthalene 80-82)
Iron has a body-centered cubic unit cell, and a density of 7.87 g/cm3. Calculate the edge length of the unit cell, in pm.
A method for determining the quantity of dissolved oxygen in natural waters requires a series of redox reactions. Balance the following chemical equations in that series under the conditions indicated
What is the probability of locating an electron between x = 0 and x = 0.2 nm in its lowest energy state in a conjugated polyene molecule
Assuming the specific heat os the solution is 4.18 (J/gC), that its density is 1 g/ml, and that the calorimeter itself absorbs a negligibkle ammount of heat, calculate delta H in kJ for the rxn
the following equilibrium constants have been determined for hydrosulfuric acid at 25degc.h2saq haq hs -aq kc 9.5
An overworked teacher placed ethanol and ethyl bromide in two different bottles but forget to label them. What simple chemical test is performed on a sample from each bottle to identify them?
A 2.983 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl aqueous solution. To this solution was added 1.910 grams of KI and 50.00 mL of a 0.00894 M KIO3 solution.
a 45- piece of ice at 0 is added to a sample of water at 22. all of the ice melts and the temperature of the water
Provide the structure of an aromatic compound with seven carbon atoms. Draw the molecule on the canvas by choosing buttons from the Tools (for bonds)
A vessel of volume 22.4 dm^3 contains 2.0 mol H2 and 1.0 mol N2 at 273.15K initially. All the H2 reacted with sufficient N2 to form NH3. Calculate the partial pressures and the total pressure of the final mixture.
If at a given moment O2 is reacting at a rate of 0.317 mol/L s, what is the rate of formation of H2O?
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