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Which one of the following is the standard for atomic mass? (a) 1H^1 (b) 66C^12 (c) 6C^14 (d) 8O^16

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Which one of the following is the standard for atomic mass? 

(a) 1H1 

(b) 66C12 

(c) 6C14 

(d) 8O16

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(b) 66C12 

Standard element used to determine atomic mass is 6 Cl2

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