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)

purpose

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

fulfill various aspects of the NGSS science & engineering standards.

- mass of entire sample ÷ # beans in sample
- Σ ( mass of bean
_{i}* % bean_{i}in sample )

materials

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

**resource**

writing mathematics