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Consider a 1g sample of radioactive Californium, Z=98 and A=245. The half life of this isotope is 45 min. On average, how many disintegrations per sec occur for this isotope?
Lactic acid (C3H6O3) which occurs in sour milk and foods such as sauerkraut, is a weak monoprotic acid.? The pH = 0.10 M solution of lactic acid is 2.43 What are the values of Ka and pKa for lactic acid
Solid lithium hydroxide is used in space vehicles to remove exhaled carbon dioxide. The products are solid lithium carbonate and liquid water
A shelf containing several chemicals (Salicylic acid, 4-(4-Hydroxyphenyl)butan-2-one {a.k.a. Raspberry Ketone} and 4-methylaniline) fell and the vials shattered.
A 0.1276-g sample of monprotic acid (Molar Mass = 1.10x 10^2) was dissolved in a 25.0 mL of water and titrated with .0633 M NaOH after 10. mL of base had been added, the pH was determined to be 5.67. What is the Ka for the acid
A compound is 40.0%C, 6.70%H, and 53.3%O by mass. Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
Decane has 4.5 min retention time on HP-1 column (25 m length, 0.25 mm I.D., 0.33 mkm film thickness) at 120C. Calculate the capacity factor for decane on HP-1 column (25 m length, 0.25 mm I.D., 0.5 mkm film thickness) at 120C. Explain.
What bond angles do you expect for each of the following, and what kind of hybridization do you expect for the central at atom in each?
What is the concentration of P retained in the soil (in mg P/kg)? What is the concentration of PO4 retained by the soil (in mg PO4/kg)?
the side of the coil which cuts magnetic flux link from the north pole first becomes the live wire. Is there any reason behind that or is it just a natural phenomena?
consider the following mechanism for the formation of a dna double helix from its strands a and ba b unstable helix
what is the ph of a solution prepared by mixing 15.00 ml of a 0.3005 m solution of lactic acid with 15.00 ml of 0.1515
What is the most important type of intermolecular attractive force that operate in each
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