13. ¿A cuántos angström equivalen 10 a la -9 cm?
a) 1,0 b) 10 c) 100 d) 0,1 e) 0,001
a) 1,0 b) 10 c) 100 d) 0,1 e) 0,001
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1 cm -----------100000000 angstroms
1 x 10⁻⁹ cms --------- x
X = 0,1 Ångström [Å]
respuesta d