1.

What is 1 Dalton?

A. a unified mass unit, 1.360539040(20) 10<sup> 27</sup>kg
B. a unified mass unit, 1.640539040(20) 10<sup> 27</sup>kg
C. a unified mass unit, 1.660539040(20) 10<sup> 27</sup>kg
D. a unified mass unit, 1.660539040(20) 10<sup> 27</sup>kg
Answer» E.


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