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II. 6,3x10-8 B. 8,5 µg
III. 8,5x10-2 C. 85 mg
63 ng = 63 nanogramos
1 ng = 1 * 10^ - 9 g
=> 63 ng = 63 ng * 1 * 10^ -9 g / 1 ng = 6,3 * 10^ - 8 g
=> opción 2.
B. 8,5 µg = 8,5 microgramos
1 g = 10^ 6 microgramos
8,5 microgramos * 1 g / ( 10^6 microgramos) = 8,5 * 10 ^ -6 g
=> opción I.
C) 85 mg
1 g = 10^3 mg
=> 85 mg = 85 mg * 1 g / 10^3 mg = 85 * 10^ -3 g = 8,5 * 10^-2 g.
=> opción III