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After performing a dilution calculation, you determine you need 25.0 mL of an aqueous stock to make 100.0mL of a new solution. How would this be prepared?
NO2 , SrO , KI , wich one produces basic solution when added to water . '
Ni , Ne , Na wich one is the least reactive
C2H6 CH4 C5H12 wich one turns liquid in room temperature
Ni , Ne , Na wich one is the least reactive
C2H6 CH4 C5H12 wich one turns liquid in room temperature
261g = ? kg
260g = ? kg
Which of the following statements about elements is TRUE:
a. they are always made up of individual atoms in their natural state
b. they combine to make compounds
a. they are always made up of individual atoms in their natural state
b. they combine to make compounds
what is the function of the funnel?
It is your first day of work in your new laboratory job. You are asked to prepare 700 mL of PBS (phosphate buffered saline). The PBS needs to be pH 7.40, with 25 mM phosphate and 140 mM NaCl. You are given a bottle of NaCl (FW = 58.45), a 1.00 M Na2HPO4 stock solution, and a 1.00 M NaH2PO4 stock solution. Describe how to prepare this buffer. (For H3PO4: pK1 = 2.12, pK2 = 7.21, pK3 = 12.66)
what is the formula for iron two sulfate?
What element has 15 protons, 18 electrons and 17 neutrons
Calculate the mass of glucose and water required to make 250 grams of 25% solution of glucose?
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#340153 on Dec 2023
#340153 on Dec 2023