What is molarity and molailty of the solution
An aqueous KNO3 solution is made using 87.6g of KNO3 diluted to a total solution volume of 1.33L. Density of the solution is 1.05 g/mol. What is its molarity of the solution? molailty of the solution? and mass percent of the solution?
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If a molecule of NO diffuses a distance of 0.778 m from a point source, calculate the distance (m) that a molecule of He would diffuse under the same conditions for the same period of time.
Use Slater's rules to calculate the shielding constant and effective nuclear charge for a 5s, 5p, and 4d electron in the tin atom. Which of these electron experience the lowest effective nuclear charge
What is the correct electron configuration for copper Answer a. [Ar]4s23d8 b. [Ar]4s23d9 c. [Ar]4s13d10 d. [Ar]3d10 e. [Ca]3d9
What is the wavelength (in meters) of photons with the following energies? In what region of the electromagnetic spectrum does each appear? 91.0 kj/mol
Calculate an approximate delta_h in kilojoules for the industrial synthesis of ethyl alcohol from ethylene: C2H4(g) + H2O(g) -> C2H5OH
What factors determine the boiling or melting points of a material?
A certain first-order reaction has a rate constant of 2.75 x 10^-2 s^-1 at 20 degrees C. What is the value for k, the reaction constant, at 60 degrees if the Energy of activation = 75.5 kJ/mol?
A concentration cell has the same kinds of half-cells, for example Cu?CuSO4(aq), but has a nonzero emf due to differences in CuSO4 molalities. Explain how it is possible for the galvanic cell Cu(s)?CuSO4(aq)?Cu(s), that contains only one CuSO4 sol
Calculate the number of moles of B at each time in the table. 0 s mol 40 s mol 80 s mol 120 s mol 160 s mol (b) Calculate the average rate of disappearance of A for each 40 s interval, in units of mol/s. 0 - 40 s mol/s 40 - 80 s mol/s 80 - 120 s m
What is the ratio of acetate to acetic acid in a 0.1 M buffer at pH 4.75? What happens when 5 mL 0.1 M HCl is added to 50 mL of this buffer?
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