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A 25.0 g sample of garden compost was analyzed for chloride content. The sample was dissolved in water and the chloride was precipitated as silver chloride. 1.58 g of dried precipitate was obtained.
Concentrations of flouride in drinking water grerater than 4.0 mg/L can cause mottled teeth in children. What is 4.0 mg/L expressed as molality
Which concentration becomes smaller as the temperature is increased from 20 degrees celcius to 80 degrees celcius
Naturally occuring sulfur consists of four isotopes: 95.0% 32s (31.97207amu); 33s (32.97146amu, 0.76%);
if 20. g or NaCl are used and only 5.6 g of HCl are isolated, what is the percent yield of HCl C.) If only 5.6 g of HCl are obtained, how many grams of Na2SO4 must also have been formed
If a eukaryotic cell were broken open and the subcellular organelles separated by ultracentrifugation, in which of the following would the citric acid cycles be found
In the citric acid cycle, how many net atp are generated between alpha-ketogluturate and malate
What are the potential advantages of a multienzyme complex compared to individual, non-complexed enzymes carrying out the same function
Treatment of D, first with aqueous acid and then with KMnO4, yields 2 carboxylic acids identified as acetic acid and pentanoic acid. (KMnO4 cleaves 1,2-diols to yield carboxylic acids.) Propose a st
For the reaction below, when 216g of ICl3 reacts with 61.3g of H2O; 2ICl3(s) + 3H2O(l)= ICl(aq)+HIO3(s)+5HCl(aq) a. which is the limiting reagent b. How many grams of HIO3(s) are formed c. How many
Ascorbic acid(vitamin c) contains 40.92 percent Carbon, 4.58 percent hydrogen, and 54.50 percent oxygen. What is the empirical formula of ascorbic acid
What is the de Broglie wavelength in cm, of a 11.9 g hummingbird flying at 1.12 102 mph? (1 mile = 1.61 km.)
Calculate the wavelength (in nanometers) of a photon emitted by a hydrogen atom when its electron drops from the n = 5 state to the n = 3 state
How many H- ions are around each Na+ ion in NaH, which has a cubic unit cell with H- ions on each corner and each face
Calculate the percent composition of each element in the compounds Benzene(C6H6) and Acetylene(C2H2). Since these are different compounds with very different properties, it may seem that this is an
A particular dye solution has an absorbance of 0.984 in a 2.0-cm pathlength cuvette. When the same solution is placed in another cuvette, it has an absorbance of 0.652. What is the pathlength of the
Find a formula for the curvature of the function P= nrt/v-nb - (an^2)/(v^2) ,where n, R, a, b,and T are treated as constants.
A 26.79 g sample of a substance is initially at 23.6 C. After absorbing 1001 J of heat, the temperature of the substance is 198.1 C. What is the specific heat (c) of the substance?
The reactant concentration in a zero-order reaction was 9.00×10^-2 M after 100s and 2.50×10^-2 M after 390s . What is the rate constant for this reaction
A solution is made by dissolving 0.676 mol of nonelectrolyte solute in 885 g of benzene. Calculate the freezing point and boiling point of the solution. Constants may be found here.
At 25 °C and 765 Torr, carbon dioxide has a solubility of 0.0342 M in water. What is its solubility at 25 °C and 1470 Torr
A solution is made by mixing 49.0 mL of ethanol, C2H6O, and 51.0 mL of water. Assuming ideal behavior, what is the vapor pressure of the solution at 20 degrees celcius
A student heated a 4.901 g sample of hydrated iron chloride. After heating, the anhydrous iron chloride has a mass of 3.010 g. Calculate the percentage by mass of water in the hydrated compound.