Explore BrainMass
Share

# Uncertainty, Signficant Figures, and Energy Diagrams

This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

Find the absolute uncertainty of the following calculations and express the answer with the proper number of significant figures.
a) 2.0394 (± 0.0008) + 3.256 (± 0.004) - 1.17 (± 0.01) = ______________________________
b) 91.3 (± 0.5) * 40.03 (± 0.02) / 16.1 (± 0.3) = _____________________________________
c) [12.34 (± 0.04) - 7.453 (± 0.007)] / 18.4 (± 0.2) = _________________________________
(6 points)
On the energy level diagram below illustrate a process that involves absorption, nonradiative relaxation, and fluorescence. Use arrow notation and label each transition.
________________ v = 4
________________ v = 3
________________ v = 2
________________ v = 1
E1 ________________ v = 0
________________ v = 4
________________ v = 3
________________ v = 2
________________ v = 1
E0 ________________ v = 0

https://brainmass.com/chemistry/modern-quantum-theory/uncertainty-significant-figures-energy-diagrams-247949

#### Solution Preview

Please see the attached file for the complete solution.
Thanks for using BrainMass.

ind the absolute uncertainty of the following calculations and express the answer with the proper number of significant figures.
a) 2.0394 (± 0.0008) + 3.256 (± 0.004) - 1.17 (± 0.01) =
______________________________

When you are adding or subtracting uncertainty, you just add the values. First add the actual numbers:
2.0394 + 3.256 - 1.17 = 4.1254  4.13 (the third number only has hundredths place)