Average atomic mass simulation Honors Chemistry

background [prelab assignment (10 points) due at the beginning of lab]

this lab is a simulation, where different type of beans represents different isotopes.  What is a simulation ?

sketch a data table (i.e. not calculations) for your experimental measurements (i.e. see the purpose & list of materials, design an appropriate experiment, then sketch a data table)


compare the calculation of the average bean mass using different methods:

  1. mass of entire sample ÷ # beans in sample
  2. Σ  ( mass of beani * % beani in sample )
fulfill various aspects of the NGSS science & engineering standards.


mixture / sample of different beans; balance

methods / data analysis

student design


Content of lab report [40 points]

data analysis (15 points)

data table containing your experimental data

calculation of the average bean mass in the sample using both methods (see purpose)

statistical data analysis, include stats output

discussion (25 points)

hypothesis:  would both methods (see purpose) provide the same result ?  basis / rationale ? may not refer to experimental results.

conclusion:  explicitly refer to statistics to support or refute your hypothesis.

describe / list two NGSS science & engineering practices that correlates to an aspect of this laboratory activity; provide an example in the lab or this lab report that meets these practices

show mathematically (do not refer to experimental results) that both of the above formulas are the same


writing mathematics