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The combustion of propane may be described by the chemical equation. C3H8(g) + 5O2(g) arrow 3CO2(g) +4H2O(g) How many grams of O2(g) are needed to completely burn 95.5 g of C3H8(g)?
If a temperature increase from 19.0 to 37.0 triples the rate constant for a reaction, what is the value of the activation barrier for the reaction
Write the balanced chemical equation for the neutralization reaction that occurs when an aqueous solution of hydrochloric acid (HCl) is mixed with an aqueous solution of potassium hydroxide (KOH).
Hydrochloric acid (HCl) reacts with sodium carbonate (Na_2CO_3), forming sodium chloride (NaCl), water (H_2O), and carbon dioxide (CO_2). This equation is balanced as written
Suppose you are given 150 mg of an unknown mixture that contains three compounds, and you are told to separate the compounds using column chromatography, using alumina as a stationary phase. How would you decide what solvent or solvent system to u..
To treat a thyroid tumor, a patient must be given a 170-mCi dose of iodine-131, supplied in a solution containing 41 mCi/mL. What volume of solution must be administered per dose?
Suppose that the atomic mass unit (amu) had been defined as one-sixth of the average mass of an atom of fluorine instead of one-twelfth of the mass of an atom of carbon-12. What would the average atomic mass of phosphorus be on this new scale
Show how to make N-methylpropionamide using propionic acid and methylamine and other necessary reagents. The methylamine and propionic acid do not both have to be used in the first step.
Calculate the work done (in joules) against a pressure of 1.0 atm at 25 o C. If 3 moles of H 2 react with 3 moles of Cl 2 to form HCl while
An environmental engineer tells you that adjusting the pH to 8.5 will decrease total soluble Cr(III) to below 1 mg/L (1.92 x 10-5 M). Is this true? In other words, is the solubility of Cr(III) in the presence of Cr(OH)3(s) at a pH of 8.5 ? 1 mg/L.
calculate the lattic parameter and the atomic radius from this information. (b) What is the planar density of atoms in the (110) plane (and sketch how they are arranged).
hat mass of KOH, in grams, is required to prepare 125 mL of 2.35 M KOH solution? How many grams of NaOH will react completely with 187 ml of 0.430m HCl?
What is the pH of the solution during the titration when the following volumes of the NaOH have been added to 34.5-mL of the acid.
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