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Given that an atom of a semiconductor has a diameter of 3.10 A, what is the maximum number of moles that fit in the channel of a processor chip that is 79.9 nm long, 76.1 nm wide and 315 nm thick?
The absorbance of solutions containing Cr as dichromate Cr2O7-2 in 1.0M H2SO4 were measured in a 5cm cell. The following results were obtained
Isotopes of elements are atoms of the same element that vary in the: 1,number of electrons associated with the nucleus. 2,number of neutrons in the nucleus. 3,number of atoms in a molecule. 4,number of protons in the nucleus.
A flask contains 0.180 of liquid bromine br2, . Determine the number of bromine molecules present in the flask.
This is for the dissolution of (NH_4)(NO_3) in water. If 4.52 mole of NH_4 NO_3 are dissolved, how many total moles of ions are produced
At 35°C, K = 1.6 10-5 mol/L for the following reaction. 2 NOCl(g) 2 NO(g) + Cl2(g) Calculate the concentrations of all species at equilibrium for each of the following original mixtures.
A sample of pure NO2 is heated to 338 degrees C at which temperature it partially dissociates according to the equation
80 micrograms of lead were detected in 5 L of drinking water. What is the concentration of lead in molarity (M)
A solution of ammonia and water contains 4.40×1025 water molecules and 8.30×1024 ammonia molecules. How many total hydrogen atoms are in this solution?
a solution is made by dissolving 10.20 grams of glucose c6h12o6 in 355 grams of water. what is the freezing-point
Draw the Lewis structure for each of the following molecules or ions. Include all lone pairs of electrons. Show the formal charges of all atoms in the correct structure.
Using standard enthalpies of formation from Appendix 2A, calculate the standard reaction enthalpy for the following reaction, the final step in the production of nitric acid
suppose that you are performing an extraction of an aqueous solution with an organic solvent that has a density less than water. Propose a method to identify and collect only the organic solvent. Assume that water and your solvent of interest are ..
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