Calculate the relative atomic mass of speedium (a fictional element) which has three isotopes with the following masses and abundances: 45Sp 44.99 amu 30.0%
47Sp 46.99 amu 60.0%
48Sp 48.00 amu 10.0%
A) 45.0 amu
B) 46.5 amu
C) 46.7 amu
D) 47.0 amu
E) 140 amu
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