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The half-life for the first-order reacion of HCl with ethylene is 15.4 s when the initial concentration of HCl is 0.67 M. What is the rate constant for this reaction? OPTIONS: A. 4.5 x 10^-2 B. 3.8 x 10^-2 C. 9.7 x 10^-2 D. 2.2 x 10^-2 E. 1.0 x 10^-2
Calculate the number of moles of Cl atoms in 1.20×1024 of magnesium chloride, MgCl2.
what is the pH of a solution of 125ml of 3.5 M of CH3COOH and 25ml of 1.25 M of NaOH ?
256 grams of sodium chloride reacts with an excess of calcium oxide. How many grams of sodium oxide are produced?
A 9.775 g. gaseous mixture contains ethane (C2H6) and propane (C3H8). Complete combustion to form carbon dioxide and water requires 1.120 mol of oxygen. Calculate the mass percent of ethane in the original mixture.
What mass of carbon dioxide is present in 1.00 cm^3 of dry air at a temperature of 15 0C and a pressure of 697 torr?
On heating 5.03 g of hydrated barium chloride, 4.23 g is left behind. What is the name of this hydrate?
but did not exactly add 4.0 mL. Instead he added 4.50mL. What was the final concentration of her standardized solution in ppm?
Which is the limiting reagent when 9 Ca atoms and 8 H3PO4 molecules react and produce 3 molecules of Ca3(PO4)2 and 9 molecules of H2?
In the formula for sodium phosphate (Na3PO4) how many moles of sodium are represented? How many moles of phosphorus? how many moles of oxygen?
The empirical formula of a compound is found to be P2O5. Experiments show that the molar mass of the compound is 560g/mol. What is the molecular formula of the compound?
how many moles of NaCl would be made by combining 20,000 moles of Na with 2 moles of Cl
A solution is made by dissolving 0.100 mols of NaOCl in 100.0 mL of water. The Ka of hypochlorous acid (HClO) is 3.0*10^-8 at 25.0 degrees C.
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