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A compound of carbon and hydrogen was burned in air to produce carbon dioxide and water. The number of moles of carbon dioxide produced was 1.5 times the number of moles of water produced. What is the empirical formula of the compound? Write the carbon first and the H second in the formula and use the underscore key to denote subscripts in the formula.
the frequency factor a is 8.7x 10 12 s- and the activation energy is 63 kj/mol, What is the rate constant for the reaction at 75C
a Balanced reaction equation must have the same number of atoms of each element on both sides of the equation. to verify that the equation is balanced, count the otoms of each element on both sides of the reaction
How much heat is required to convert 47 g of ethanol at 36 degrees Celsius to vapor phase at 78 degrees Celsius?
The molecular shape of [TeF3 ]-1 is: A. tetrahedral B. square planar C. square pyramidal D. trigonal bipyramidal E.octahedral F. T-shaped G. see-saw, butterfly, or unsymmetrical tetrahedron
We wish to prepare a buffer of pH 10 using common laboratory reagents. How many mL of 6M HCl would we have to add to a solution prepared by adding 100 mL of 15M NH3 to 200 mL of water?
What is the hydronium-ion concentration of a 5.23 10-4 M solution of p-bromobenzoic acid, BrC6H4COOH, for which Ka = 1.00 10-4
Hydrogen peroxide decomposes into water and oxygen in a first order process. At 20 degrees C, the half life for the reaction is 3.92 x 10^4 seconds
Calculate the number of moles in each of the following: a) 85.2 g of Ni, b) 144 g of K, c) 6.4 g of H2O, d) 308 g of BaSO4, e) 252.8 g of fructose C6H12O6
has a volume of 58.0L and a pressure of 645mmHg. What is the temperature, in kelvins and degrees Celsius, of the gas?
How much heat energy is required to raise the temperature of 0.368 of copper from 23.0 to 60.0 ? The specific heat of copper is 0.0920 .
What is the [OH-] in a solution that has a [H3O+] = 1 x 10-6 M?
Averge frequency of light emitted a 100 w lightbulb is 5.5x10^14 Hz. How many photons per second does the light bulb emit?
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