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Based on the results below, what is the charge of the electron in zorgs ()? Drop # Charge A ?5.1×10?9 B ?1.0×10?8 C ?6.8×10?9 D ?1.36×10?8
A certain carbon-hydrogen compound contains 84.1% C by mass and the remainder is hydrogen. What is the empirical formula of the compound
Ephedrine was once used in diet pills that could be purchased without a prescription. Ephedrine is composed of 72.7% C, 9.15% H, 8.49% N, and 9.68% O. What is the empirical formula for ephedrine
How many glucose molecules does a fat cell, which has a diameter of 2.47 micrometers, contain when its internal glucose concentration is 1.47 mM
A spherical fat cell has a diameter of 2.47 micrometers. The fat cell contains three copies of the protein azurin. What is the molar concentration of azurin within the fat cell
A solution contains 11.00 g of unknown compound dissolved in 50.0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -6.59 *C. The mass percent composition
Which of the following is the correct value for (delta)Go' (delta G naught prime: standard free energy change) for an equilibrium reaction in which 2A + B = C + 3D? The equilibrium concentrations fo
When the reaction A + B = C is at equilibrium, the concentrations of different chemicals is as follows: [A] = 2.00 mM, [B] = 3.00 mM, and [C] = 9.00 mM. What is the standard free energy change for t
Find the molarity of the carbonate in the solution. A solution is prepared by dissolving 11.60g of a mixture of sodium carbonate and sodium bicarbonate in 1.00 L of water. A 300.0-cm^3 sample of the
The small bubbles that form on the bottom of a water pot that isbeing heated (before boiling) are due to dissolved air coming outof solution.
Calculate the size of the quantum involved in the excitation of (a) an electronic oscillation of period 1.0 fs, (b) a molecular vibration of period 10 fs, (c) a pendulum of period 1.0s Express the r
At what pressure does the mean free path of argon at 25C become comparable to the size of 1dm^3 vessel that contains it? take ?=.36nm^2
A 12-gram mixture of methane, CH4, and ethane, C2H6, is completely combusted in oxygen. If the total mass of H2O produced is 23.4 grams, what was the approximate mass of the methane in the original
Methanol (CH3OH) can be decomposed to form hydrogen gas and carbon monoxide gas. If 125 grams of methanol is decomposed, and 13.6 grams of hydrogen gas is produced, what is the percent yield of hydr
If you mix 200. mL of 1.0 M KCl with 300. mL of 2.0 M KCl, what is the molarity of KCl in the final solution?
Calculate the work of expansion accompanying the complete combustion of 1.0g of glucose to carbon dioxide and (a) liquid water, (b) water vapour at 20 degrees Celsius when the external pressure is 1
What is the silver ion concentration in a solution prepared by mixing 339 mL of 0.398 M silver nitrate with 405 mL of 0.591 M sodium chromate? The Ksp of silver chromate is 1.2 × 10-12
A polyamide was prepared by bulk polymerization of hexamethylene diamine (9.22 g) with adipic acid (11.68 g) at 280 degrees C. Analysis of the whole reaction product showed that it contained 2.6 x 1
The solubility of cerium sulfate, Ce2(SO4)3, in water is 0.34 g per 100 mL at 100 °C and 14.2 g per 100 mL at 10 °C. Is the dissolving of cerium sulfate in water an endothermic or exothermic
The weight of an object is the product of its mass, m, and the acceleration of gravity, g (where g=9.8 ~\rm m/s^2). If an object's mass is m=10.~\rm kg, what is its weight
If a photon has a wavelength of 412.2 nm, what is its energy in J, frequency in s^-1, wavenumber in cm-1, and linear momentum in kg m/s
For a reaction of the form, A + B + C Products, the following observations are made: doubling the concentration of A increases the rate by a factor of 4, doubling the concentration of B has no effec
Given the following reaction. (Equation not balanced.) ZnS + O2 ? ZnO + SO2 How many grams of SO2 can be made from the reaction of 18.5 grams of O2 with excess ZnS
A solution is prepared by dissolving 11.60g of a mixture of sodium carbonate and sodium bicarbonate in 1.00 L of water. A 300.0-cm^3 sample of the solution is then treated with excess HNO3 and boile