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A drinking water supply is suspected of being contaminated with lead. Samples of water aspirated directly into an air-acetylene flame gave an absorbance of 0.68 at 283.3nm. Standard solutions containing 0.5 and 1.0 ppm were found to exhibit absorbances of 0.43 and 0.86 respectively. Assuming the Beer-Lambert law is obeyed calculate the concentration of lead within the water sample.
A 32.1 g iron rod, initially at 23.0^C, is submerged into an unknown mass of water at 63.4^C, in an insulated container. The final temperature of the mixture upon reaching thermal equilibrium is 59.4^C.What's the mass of water
Alkyl halides add to alkenes in the presence of AlCL3; yields are the highest when tertiary halides are used . predict the outcome of the reaction of t-pentyl chloride
When 2-chloro-2-methylbutane is treated with a variety of strong bases, the products always seem contain two isomers (A and B) of formula C5H10.
The mass of the sample before heating was 3.327g and after heating the mass was 2.432g. What is the percent composition of sodium carbonate in the original mixture?
How would you adjust the volume of a container in order to maximize the product yield in the following reaction
Question- An electron microscope employs a beam of electrons to obtain an image of an object. If the wavelength of the electron is 18.3 pm, what is its velocity
My assignment is identify the pathophysiology of cardiac disorders. I know a disorder is different from a disease but I don't know how to begin.
What role does ammonium bromide play in the conversion of the trans-substituted aziridine to the diazabicyclo
Draw the three C-containing products that are obtained when 2-bromo-2-methylpropane is dissolved in a mixture of 80% ethanol and 20% water.
compare the ph values in the dilution experiment for each of the acids and bases used to the ph determined for
The rate constant for decay of 45Ca20 is 4.233x10-3/day. What is the half-life of 45Ca20? a) 81.86 days b) 163.7 days c) 327.4 days d) 409.3 days e) none of these
He is heated until the pressure reaches 3.50 atm. What is the final temperature in degrees Celsius
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