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The total of $12,000 is invested in 2 funds paying 9% and 11% simple interest. If interest for first year is $1,180, how much of $12,000 is invested at 9%?
The minimum energy required to knock an electron out of an atom of cesium is 3.43 x 10-19 J. Cesium metal is used in the photocells of automatic door openers.
Discuss the efficiency of elution process to separate cations and anions in solutions which are having the Na, Cu, CrO4, & Cl and suggest how the separation can be improve?
Determine the bulk density, in units of g.mL-1, of a metal with an atomic mass of 80.0 g.mol-1. This metal has an FCC crystal structure with a unit cell dimension of a = 0.160 nm.
Find value of the investment (if you have 100 shares before split) before and after split? How has split changed (or not changed) overall value of the investment in Pohlman?
A student reacts 50.0 g of silver (I) nitrate with 20.0 g of copper metal to prepare copper (II) nitrate and silver metal.Write down the net ionic and total ionic equations for this reaction.
In a coffee cup calorimeter, 50.0ml of 1.00M NaOH and 50.00ml of1.00M HCI are mixed. Both solutions were originally at24.6.C.After the reaction, the final temperature is 31.3.C.
Explain how much heat was released in this experiment by the combustion of butane? Where the specific heat of water is 4.18 J/gram degree.
Determine the total pressure (atm) of a gas mixture of 0.475 grams of He and 0.726 grams Ne in an 763 mL container at the 150°C?
Calculate the heat capacity of this calorimeter. The combustion of 0.1584 grams of benzoic acid increases the temperature of a calorimeter by 2.54.C. The energy released by the combustion of benzoic
The molar conductance at infinite dilution of AgNO3, NaNO3 and NaCl are 116.5, 105.2 and 110.3 ohm-1cm2mole-1 respectively. Based on this, identify the molar conductance of AgCl at infinite dilut
The resistance of a cell containing the solution at the same temperature was found to be 55ohm. The specific conductance of 0.1N (Normality) KCl solution at the 230C is 0.012ohm-1cm-1. Calculate the
Based on the reaction 4/3Al + O2 --->2/3Al2O3 and ΔG = -827KJ/mole ofO2; Determine the minimum EMF needed to carry out and electrolysis of the Al2O3. (Given F = 96500 Cmole-1)
Acetic acid can be used to make a buffer in the single range among the pH 5.74 and 3.75. But phosphorous acid can be used to make a buffer among two ranges:
Weights of boxes of Brand Z cereal were found to be normally distributed with a mean of 17.0 ounces and a standard deviation of 0.4 ounces. What percentage of boxes will weigh more than 17.5 ounces?
Ibuprofen (advil) is an anti-inflammatory, but can cause stomach upset. Acetaminophen (e.g. Tylenol) relieves pain, but is not an anti-inflammatory or anti-coagulative drug.
Michael prepared a buffer of acetate ion and acetic acid by taking the 250 mL of 0.20 M acetic acid and adding the 250 mL of 0.10 M sodium hydroxide.
Determine the pH during the titration of 20.00mL of 0.1M triethylamine (kb=5.2e-4) with 0.1M HCl after the following volumes are added, 0mL, 10mL, 20mL, 25mL.
Water softeners remove metal ions such as Fe3+, Fe2+, Ca2+, and Mg2+ (which make water "hard") by replacing them with enough Na+ ions to maintain the same number of positive charges in the s
Determine the change in internal energy of a system that absorbs .515kJ of heat from its surroundings and has .147 kcal of work done on it?
What are the major difference among the three- dimensional and two-dimensional models of methane and ethane? When might you choose to use a two-dimensional model rather than a three-dimensi
The depletition of O3 reacts with 0.670g NO, determines how many grams of NO2 will be formed? Explain which compound is the limiting reagent? Determine the number of moles of the e
On the particular section of the CPA exam for which scores were normally distributed with the mean of 600 points and standard deviation of 70 points. What percent of students scored lower than 630 o
Discuss why Iodine minus is a better nucleophile than the Fluorine minus in ethyl alcohol but Flourine minus is a better nucleophile than Iodine in the CH3CN
The absorbance of this solution at a wavelength of 366 nm was found to be 0.355. A student measures the visible absorption spectrum for a 1.50 x10-4 M solution of potassium dichromate in a 0.00