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Explain when doing a recrystallization using a Buchner funnel, what happens to the impurities that are more soluble than your compound in the solvent used?
Neon lamp spectrum shows many more distinct lines than that of hydrogen lamp. The reason is that
Assuming that the water is contaminated, devise a method for disposing of the contaminated water without contaminating the environment, but allowing the recycling plant to resume operations as soon as possible.
What is the lead (II) ion concentration in a solution prepared by mixing 397 mL of 0.416 M lead (II) nitrate with 457 mL of 0.284 M sodium fluoride? The Ksp of lead (II) fluoride is 3.6 × 10-8
An enzyme (MW = 20,250) catalyzes the hydrolysis of a newly discovered substrate. The kcat was found to be 2000 sec-1 and Km = 0.05 M. Using this information answer the following questions.
what is the total molar concentration of all the ions in 0.030 M solutions of the following salts in water? a) 0.030 M KCl = ________ M ions b) 0.030 M CuSO4 = _____ M ions c) 0.030 M CaCl2 = _______ M ions
Explain how many neutrons are emitted when a californium-249 nucleus (Z=98) is bombarded with a carbon-12 nucleus to produce a >257/104 Rf
two moles of neon gas initially at 33.2c and a pressure of 0.6 atm are compressed adiabatically to one-third of their
to obtain the same antifreeze protection requires 76g of propylene glycol to replace each 62g of ethylene glycol.
The Ksp of AgI is 8.3 x 10-17, what is the molar solubility of AgI in a 0.10 M AgNO3 solution. What principle does this illustrate
a quantity of 1.834g of ethanol c2h5oh wasburned in a constant-volume bomb calorimeter. consequently thetempertature of
Sodium hypochlorite (NaClO) is the active ingredient in household laundry bleach. Explain what is the pH of 0.20 M NaClO
The element lanthanum has an atomic weight of 139 and consists of two stable isotopes lanthanum-138 and lanthanum-139.
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