The Atomic Mass of Tungsten Is 183

question 63

Multiple Choice

The atomic mass of tungsten is 183.84 u. Given the following information for the mass and abundance of the other common isotopes, calculate the atomic mass of tungsten-186.
W-180 179.9467 u 0.12%
W-182 181.9482 u 26.50%
W-183 182.9502 u 14.31%
W-184 183.9509 u 30.64%
W-186 28.43%

• A) 185.75 u
• B) 186.48 u
• C) 186.98 u
• D) 184.41 u
• E) 185.95 u

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Definitions:

Schedule Variance

The difference between the planned and the actual project progress, indicating whether a project is ahead or behind schedule.

Resource Flow Variance

Variations in the rate, timing, and quality of resources being supplied to or produced by a process.

Detailed Cost Estimates

An in-depth prediction of the likely costs of a project, based on detailed information and analysis.

Estimate At Completion

A forecasting tool used in project management to predict the total cost of a project at its completion.