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To reach molar ratios, the number of moles of magnesium and oxygen were reached and simplified into the lowest whole number ratios. The empirical formula of magnesium oxide was then decided. During data processing, the percentage uncertainties associated with masses were found so that the percentage uncertainties of the number of moles were concluded.
4.Number of moles of oxygen atoms that were used. = 0.0080Mole (the number of moles of oxygen = mass / atomic weight . The atomic weight of magnesium is 16.0 g / mole ) 5.Simplest ratio: Mg = 0.0096Mole = 1.2 0.0080Mole Oxygen = 0.0080mole = 1 0.0080mole Multiply by
When the temperature is -273?, the volume will be 0. However, gases do not really reach a 0 volume but the spaces between molecules approach 0. We use the unit called Kelvin (K) because absolute zero means the temperature never goes down more than -273?
Trends across the Third Period Bonding Structure Conductivity Melting Point Reaction w/ Water Na Metallic Body Centred Cubic Good High Basic Mg Metallic Hexagonal Close-packing Good High Basic Al Metallic Face-centred Cubic Good Higher Amphoteric Si Giant Covalent Diamond Type Semi-conductor Highest Amphoteric P Simple or Giant Trigonal Piramidal Insulator
of the two half-cells (V). Sample calculations will be provided to show the calculations needed for the preparation of copper sulfate penta-hydrate solutions, preparation of zinc sulfate hepta-hydrate solutions, the preparation of the salt bride, uncertainties and the percentage error. The formula C1.V1 = C2.V2 will be used throughout the representation of the calculations.
In fact, only water and no gas was produced. As time went by, the solution was turning milky white. This was due to the production of MgO which is white in color and since it is insoluble in water, it turns water milky.
Calculate the percentage composition of magnesium oxide using your experimental data from Part A. The percentage composition of magnesium is 61.76% and the percentage composition of oxygen is 38.24%. 1. Calculate the percentage composition of magnesium oxide using your experimental data from Part B.
Moles of O Uncertainty percentage (%) Absolute Uncertainty (%) 0.083 0.001/0.083 0.012 0.114 0.001/0.114 0.009 0.022 0.115 0.001/0.115 0.009 0.093 0.001/0.093 0.011 5.88 0.131 0.001/0.131 0.008 0.058 0.001/0.058 0.017 1.17 0.039 0.001/0.039 0.026 0.021 0.001/0.021 0.048 1.45 0.164 0.001/0.164 0.006 0.039 0.001/0.039 0.026 0.158 0.135 0.001/0.135 0.007 0.056 0.001/0.056 0.018
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