Trial Trial 2 Tria13 1. Mass of Mg consumed, g a 2. Moles of Mg consumed, n 39 3

Question

Trial Trial 2 Tria13 1. Mass of Mg consumed, g a 2. Moles of Mg consumed, n 39 3. Initial eudiometer volume, mL Loo mu 4. Final eudiometer volume, mL 5. Volume of gas, L 6. Temperature, oCIK 7. Barometric Pressure, mmHg 8. vapor pressure of water, mmHg 9. Partial pressure Hz, mmHglatm 10. Rexperimental, Latm/ mol K. 11. Average Experimental R value at a 43 12. Deviation from the Average o oo 13. Average Deviation 2, Dos 14 Average Deviation 15. Error IRep Raeol 16 Relative Error Instructor Grade on Precision Instructor Grade on Accuracy (0-3 Points) (0-3 points) Sample calculation: (Attach sheets as needed)

Explanation / Answer

Limiting significant figures:

R = cconstant, has no effect in figs.

Deviation of average = 0.004, that is 1 sig fig

Averag R value = 2 sig fig

P --> 4 sig fig

Vap pressure = 3 sig fig

P H2 = 4 sig fig

T = 5 sig fig

V = 4 sig fig

therefore

the largest effect is due to the the 3 sig fig used in Pressure of vapor

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