40. Solution to Chemistry Problem

16.2 A 0.2542 g sample of the alloy was dissolved in a mixture of acids (HNO3 + H2SO4) and transferred to a 1000.0 cm3 volumetric flask. The intensity of atomic absorption of zinc at 213.9 nm is equal to 54 scale divisions. Determine the mass fraction of zinc (%) in the alloy using the calibration graph method. To plot the traffic, a series of solutions with a concentration of 2.0; 4.0; 6.0; 8.0 and 10.0 μg Zn in 1.0 cm3 were prepared. The intensity of atomic absorption of 12; 24; 36; 47 and 59 scale divisions was measured for them.