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Assume the combustion of 55.0 mg of a substance containing only C and H yields 185.9 mg of CO2 and 38.1 mg of H2O. An independent however imprecise method indicates the molecular mass is between 78 and 80 amu.
Find out both the empirical and molecular formulae of the substance.
Calculate the final temperature when a 20.4 gram sample of ice at 0oC is placed into a styrofoam cup containing 111 grams of water at 72.7 oC. Assume that there is no loss or gain of heat from the surroundings.
Calculate the enthalpy change for the reaction in kJ/mol HCL. For this problem, assume that the calorimeter loses only a negligible quantity of heat, the total volume of the solution is 100 ml, the density of the solution is 1.0 g/ml, and its spec..
The order of skunks is caused by chemical compounds called thiols. These compounds, of which butanethiol(C4H10S) is a representative example, can be deodorized by reaction with household bleech (NaOCl) according to the following equition:
Balance each of the following equations and choose the appropriate expression for its equilibrium constant. a. NO(g)--> N2O(g)+NO2(g)
A: What is the theoretical yield for this reaction under the given conditions. B: What is the percent yield for this reaction under the given conditions
What alkene (including cis and trans isomers) would be produced by the dehydration of the following alcohols? Where possible, predict the relative amounts of each product according to Zaitsev's rule. a. 3-pentanol b. 2-methyl-2-butanol c. 1-butano..
a reaction in which a b and c react to form products is zero order in a one-half order in b and second order in c.by
we are doing an analysis of cola lab in my chem I lab. We have to do pre-lab questions and one of them is- how will you use compounds of different colors to determine the relationship between percet transmittance and wavelength? or between absorba..
unknown concentration of sodium hydroxide for complete neutralization. What is the molarity of the sodium hydroxide solution?
Density of aluminum is 2.7 g/cm^3 or 2.7 g/ml.How heavy (in grams) would be the coke can be instead of soda it would be filled in with aluminum. volume of a soda can is 303 ml
If the anhydrous compound (AC) in the preceeding problem has a molar mass of 160g/mol, what are the water crystallization (X) and formula for the hydrate
The decomposition of urea in 0.1 M HCl is first order in urea and first order overall. When [urea] = 0.200 M , the rate at 61.0 °C is 8.56 x 10-5 M/s. What is the concentration of urea in this solution after 4751 s if the starting concentration is..
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