Isotopes of the same element have different
a. positions on the periodic table.
b. atomic numbers.
c. mass numbers.
d. elemental symbols
user: one mole of copper equals how many atoms?
a. 0.166 atoms
b. 6.02 atoms
c. 6.02 ×1023 atoms
d. 1.66 ×10-22 atoms

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