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When an alcohol burner is used for heating, the reaction shown below occurs. If this burner is used to heat 355 mL of water from 25.0ºC to just boiling, what is the minimum amount (in grams) of ethanol (C2H5OH) that needs to be in the burner? (The specific heat of water is 4.184 J/gºC.)
C2H5OH(l) + 3O2 --> 2CO2(g) + 3H2O(l)Δh = -1081kJ/mol
Carbon and silicon belong to the same group and are known to have similar properties. Do you think that silicon can replace the role that carbon plays in organic chemistry
a sample of a compound containing only magnesium and oxygen is found to have 194g Mg and 256g of O. What percentages of Mg and O in this compound?
A solution of 0.01M acetic acid is found to have a PH of 3.63 . Calculate the Ka for the acid
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount from pure gasoline.
A polypeptide is completely hydrolyzed, then reacted with PITC, followed by amino acid chromatography. What information is obtained
Determine the final concentration if a 144-mL portion of that solution is diluted using water of 143 mL ?
The pressure of 4.57 L of an ideal gas in a flexible continer is decreased to one-third of its original pressure, and its kelvin temperature is decreased by one half
A 12.00 g sample of manganese is heated and allowed to react completely with the oxygen in the air to form an oxide having a mass of 18.99 g. What are the moles for each component? Also, what is the whole number ratio of manganese to oxygen.
1. Consider treating polyenes, ethylene, butadiene, hexatriene, etc., with the one-dimensional particle-in-the-box model. What length polyene (i.e., number of C atoms) is required to absorb light in the red region of the spectrum? How does tha..
explain how to correct for the partial pressure of water vapor when calculating the partial pressure of a dry gas that is collected over water.
Why does G always decrease as you move towards equillibrium no matter what concentrations of product and reactant you start with? or does it always decrease
when lead metal pb is added to a 0.300 m solution of cr3 at room temperature an oxidationreduction equilibrium is
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