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What are the boiling point and freezing point of a 2.58 m solution of naphthalene in benzene? (The boiling point and freezing point of benzene are 80.1°C and 5.5°C, respectively.) boiling point °C freezing point °C
During photosynthesis chlorophyll a absorbs light of 440 nm and emits light of 670 nm.
Calculate how much you would obtain wiht 1 x 0.6 mL extraction. 3. Which method is more efficient.
Using the data in your textbook, calculate the concentrations of the molecular and ionic species and the pH in aqueous solution that has a formal composition of 0.0700 M KH2PO4 + 0.5500 M K2HPO4.
When 28.0 ml of 0.500 M H2SO4 is added to 28.0 ml of 1.00 M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temperature rises to 30.17 degrees Celsius. Calculate the delta H of this reaction.
balanced chemical equation for the aqueous neutralization of hydrochloric acid with sodium hydroxide forming sodium chloride and water
Determine the mass of snow that can be completely melted - Determine the mass of snow (frozen water) that can be completely melted with the application
What is dry THF. And can we use it as a general solvent in synthesis of ionic reactions of alkyl halides.
Calculate the heat required to convert 58.0 g of C2Cl3F3 from a liquid at 14.90 degrees C to a gas at 90.75 degrees C.
For a zero order chemical reaction, the A. half life period is directly proportion to the initial concentration of the reac-tants. B. plot of products concentration with time is a straight line through the origin
Naturally occuring iodine is iodine-127. medically, radioactive isotopes of iodine-125 and iodine-130 are used. a)write the atomic symbol for each isotope. b)in what ways are the isotopes similar, and in what ways do they differ
Tests on human subjects along the East Coast of the United States in 1965 and 1966, following the era of atomic bomb testing, revealed quantities of about 1.71 pCi of plutonium radioactivity (alpha radiation) in a test subject. How many disintegra..
The best means of personal protection from radiation for emergency responders is the implementation of three basic principles: time, distance and shielding.
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