Molar Mass of Oxygen

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Molar Mass of Oxygen

Topic: GAS

Assessment: DC, DPP, CE

Name: Nicholas Sudharta

Partner (s): Bryan Ap

Date of Experiment:

Data Collection________________________________________________________

Mass of Test Tube= 31.32 g

Volume of [10% solution] = 5 mL

Mass of [10% solution] = 5 g (at r.t.p conversion)

*r.t.p conversion, at 25°C and 1 a.t.m, convert 1.00 g/mL

Displaced Volume of Water

Trial 1

Trial 2

Water

0.052 L

0.050 L

Data Processing________________________________________________________

Average values:

Worked Example for Water:

Average Trial Value

Water

0.051 L

Assumptions:

Pressure () = 1 atm.

Temperature () = 25° C= 298.15 K

________

Gas Constant () = 0.082057

Chemical Reaction: Decomposition of Hydrogen Peroxide

Ratio of mol between Hydrogen Peroxide and Water

Ideal Gas Formula

Calculate mol of Water produced

[using Ideal Gas formula] Rearrange:

Calculate molar mass of Water using the mass of Hydrogen Peroxide

Calculate the individual % of elements in Water

Using the periodic table values:

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