The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from
Chapter 4, Problem 4-3(choose chapter or problem)
The ratio of the number of atoms of the isotopes 69Ga and 71Ga in eight samples from different sources was measured in an effort to understand differences in reported values of the atomic mass of gallium: Sample 69Ga/71Ga Sample 69Ga/71Ga 1 1.526 60 5 1.528 94 2 1.529 74 6 1.528 04 3 1.525 92 7 1.526 85 4 1.527 31 8 1.527 93 SOURCE: J. W. Gramlich and L. A. Machlan, Anal. Chem. 1985, 57, 1788. Find the (a) mean, (b) standard deviation, and (c) variance. (d) Write the mean and standard deviation together with an appropriate number of significant digits.
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