Determine the molecular mass and its uncertainty for C6H5OH. Note: Significant f

Question

Determine the molecular mass and its uncertainty for C6H5OH. Note: Significant figures are graded for this problem. To avoid errors, do not round your answers until the very end of your calculations and use the atomic masses given in the table to the right.

Determine the molecular mass and its uncertainty for C6H50H. Note: Significant figures are graded for this problem. To avoid errors, do not round your answers until the very end of your calculations and use the atomic masses given in the table to the right. Element Atomic Mass Number Number 1.00794 0.00007 g mol C 12.0107 t 0.0008 t g/ mol O 15.9994 t 0.0003

Explanation / Answer

Molecular mass and its uncertainty for C6H5OH

Given-

H = 1.00794 ± 0.00007

C = 12.0107 ± 0.0008

O = 15.9994 ± 0.0003

Molecular mass of C6H5OH = 6*C + 6*H + O

  = 6*(12.0107 ± 0.0008) +6*(1.00794 ± 0.00007)+15.9994 ± 0.0003

  = (72, 0642 ±0.0048) + (6, 04764 ±0.00042) +(15.9994 ±0.0003)

= 94.11124g/mol ± 0.00552g/mol

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