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A particular element has two naturally occurring isotopes. The first makes up 20.000 % of the total and has a mass of 10.0129 amu's. The second has a mass of 11.0091 amu's. Determine the weighted atomic mass of this element.
a. What is the energy rate (Btu/min) for heating the air?
Do carboxylic acids react with ylids. If not, why would it be bad to have carboxylic acid present during a reaction between benzaldehyde and a ylid
a 37.60 g sample of liquid aluminum at 955.0 oc is poured into a mold and allowed to cool to 23.0 oc. how many kj of
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
Explain how did your values for the mean heats of neutralization compare for the two acid-base reactions. Explain why would you expect the heats of neutralization for these reactions to be the same, within experimental error. Define what is the ne..
One of the main components of hard water is CaCO3. When hard water evaporates, some of the CaCO3 is left behind as a white mineral deposit. If hard water solution is saturated with calcium carbonate, what volume of the solution has to evaporate to..
gas is introduced into an evacuated 3.58 L flask at 65 deg. C, what is the pressure inside the flask
solvent to be used to extract a compond from an aqueous solution and when carrying out an extraction, what are the advantages/ disadvantages of having your extraction solution more/less dense than water?
The sample is diluted with 72.178 g of water. A 14.024 g aliquot of this solution is then titrated with 0.1097 M HCl. It required 29.55 mL of the HCl solution to reach the methyl red endpoint. Calculate the weight percent NH3 in the aqueous waste.
Although the solution of 2, 6-dichloroindophenol had known amounts of solute and solvent, explain why was it necessary to standardize it before using it
Use the standard half-cell potentials listed below to calculate the standard cell potential for the following reaction occurring in an electrochemical cell at 25°C.
How could you use a conductometric titration to determine the molarity of either reacting solutions, assuming you knew the concentration of one
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