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An experiment calls for 425 ml of 65% w/v solution of NaCl (Mw = 58.44). How many grams of NaCl are needed?

How do you prepare 1 L of 10 mM Tris pH 8 (Mw = 121.14), 500 mM NaCl (Mw = 58.44) from a 1 M stock of Tris pH 8? 

Using the standard curve below, what is the concentration of a sample that gives an absorbance of 0.2 when 4 microliters of sample are assayed?

The SDS and the safety diamond contain all of the following EXCEPT

Which of the following statements explains why H2O is a stronger acid than CH4?

Which of the following statements best explains the observation that hydrogen fluoride has the highest boiling point of all the hydrogen halides?

Identify bond-line structures for constitutional isomers with a molecular formula of C3H8O.

The bonds indicated by the arrow in the following compound results from the overlap of which orbitals?

Which orbitals are involved in the C–O sigma bond in acetone, shown below?

Which of the following best explains why phenol is more acidic than ethanol.