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An unknown compound containing only carbon and hydrogen was burned in excess oxygen. When 7.714 grams of the compound was burned, 24.205 grams of carbon dioxide and 9.911 grams of water were produced. If the unknown compound has a formula mass of 196.36 g/mol, what is the molecular formula of the compound (don't forget to enter subscripts of 1)?
For each of the following states described in the following list, calculate the final pressure, as well as q, w, ?U, and ?H. a) the gas is expanded isothermally and reversibly until the volume doubles
Using the technique of the previous problem ?E was found to be -2,000.00 kJ/mol of an unknown liquid hydrocarbon at 298 K. In another experiment it was determined that for each mole of hydrocarbon, 4 moles of oxygen gas are consumed and 9 moles of..
what mass of H2O is required to form 1.6 l of O2 at a temperature of 273 k and pressure of .936 atm
heated from 20 to 50 degrees Celsius. How many calories were needed to bring about the temperature change?
Predict that it was dissolved in HCl then mixed into the diethyl ether because diethyl ether is a base and since the benzoate contains an amine group they would remain unreactive with one another.
The type of enzyme regulation where a regulatory molecule binds to the enzyme and changes the shape of the active site is called
An analysis showed that 25.0 g of this hydrate, CoCl 2 * 6 H 2 O, contains 11.3 g of water. What is the percent water by weight in this hydrate?
calculate the concentration of sodium benzoate must be present in a 0.20 M solution of benzoic acid
what is the mole fraction of ethanol, C2H5OH, in an aqueous solution in which the ethanol concentration
Following is an example of a triprotic acid with pK values closer than 3 units, and pK3 less than 10. You have a 20.0 mL solution of the triprotic acid, H3A, with a concentration of 0.128 M, and are titrating it with a 0.250 M solution of NaOH.
How much heat is produced in burning 9 mol of ethylene (C2H4) under standard conditions if reactants and products are brought to 298K and H2O (l) is formed
What are the typical values of ΔH in kJ/mol for aqueous solutions?
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