Which statement below best describes the current model of the atom based on Rutherford’s gold foil experiment?

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

6) (a) calculate the absorbance of the solution if its concentration is 0.0278 m and its molar extinction coefficient is 35.9 l/(mol cm). the depth of the cell is 5 mm. (b) what is the %t? (7) calculate the absorbance of the solution if the transmitted light intensity is 70% of the initial light beam intensity

What mass of ca(oh)2 is needed to make 1250ml of a .75m solution?