How is the AHfusion used to calculate the energy released when a mass of liquid freezes?
A. Grams liquid x mol/g < 1/AHfusion
B. Grams liquid < 1/ A Hfusion
C. Grams liquid x mol/g < AHfusion
D. Grams liquid AHfusion

Which of the dna typing techniques do you think you would choose if you had to analyze a dna sample? why?

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products