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A sample of an alloy containing only zinc and aluminum had a mass of 0.5937g. When this sample was reacted with excess HCl, 315.23ml of hydrogen gas, collected over water at a barometric pressure of 757.1 torr and a temperature of 21.3C, was generated. Determine the number of moles of hydrogen gas generated.
Calculate the number of sodium ions in (6.107x10^1) g sodium phosphate. 2. An aqueous solution of 10.0 grams of ammonium sulfide is mixed with an aqueous soluion of 10.0 grams of copper (II) chloride. What is the formula of the compound that precipit..
Which of the following is an experimental fact that valence bond theory cannot explain, but molecular orbital theory can? the paramagnetism observed for O2 the N-N bond order in N2 the rotational barrier about the C-C bond in ethylene the existenc..
an accident to the head can effect the ability of a person toventilate breathe in and out and so can certain drugs.
use the chemical equation 2ch3ohg 3og2co2g4h2og to estimate the quantity of energy released in the combustion of
A compound composed of iron and carbon monoxide, Fe x (CO) y, is 30.70% iron. What is the empirical formula for the compound
Predict the wavelength (in nm) of the lowest-energy electronic transition in the following polymethine ion:((CH_{3})_{2}N^{+}=CH-CH=CH-CH=CH-N(CH_{3})_2) Assme that all the C-C and C-N bond lengths equal
A buffer is made up 0.24 M propanoic acid, CH3CH2COOH, a weak monoprotic acid, and 0.17 M of sodium propanoate, CH3CH2COONa. What is the pH of the solution.
The reference electrode is attached to the positive terminal of the potentiometer, and the silver electrode is attached to the negative terminal. The solubility constant of TlBr is Ksp = 3.6 × 10-6 and the solubility constant of AgBr is Ksp = 5.0 ..
Write an equation showing stereochemistry of starting material and the product,for the reaction of (S)-1-bromo-2-methylbutane with sodium iodide in acetone.what will be the configuration (R or S)of the product
I take 250.0 mL of 0.25 M NaCl and mix it with 500.0 Ml of 0.100 M NaCl. what is the concentration of NaCl in the mixture
A first order reaction has a rate constant of 0.342 sec-^1 at 29.5 degrees C. If the activation energy is 69 kJ, calculate the temperature in degrees C at which the rate constant is 0.428 sec^-1.
A 31.43 ml volume of .108M NaOH is require to reach the phenolphthalein endpoint in the titration of a 4.441g sample of vinegar. Calcute the percent acetic acid in the vinegar.
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