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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.
For example, the uncertainty of constant of Pressure and Volume, it had 8% of uncertainties so the biggest constancy was 1200 (highest constancy was 46,900 �3750 - the lowest constancy was 45,700 �3660)
According to the theory, at 82?, the height (volume) must be the greatest but in the experiment, the height showed the lowest scale. Moreover, it does not show a graphically straight line which means there was something wrong with the temperature.
in trial two, human error does not play a huge role in this lab, because all measurements were taken with a digital instrument. Therefore the errors in this lab are mainly systematic, but could also be due to an incomplete reaction occurring due to impartial combustion.
3.Number of moles of magnesium. = 0.0091 Mole (the number of moles of magnesium = mass / atomic weight . the atomic weight of magnesium is 24.3 g / mole ) 4.Number of moles of oxygen atoms that were used.
1 × wire cutters To be used for accurately cutting strips of Magnesium with straight ends. 1 × 50 ± 0.10cm3 burette To be used for storing 2M HCl so that 15cm3 of HCl can be withdrawn. A burette was the choice of apparatus since it had a lower random
Record the mass of crucible and lid once it has cooled. Do not handle it with your hands. 4. A magnesium ribbon which was weighted 0.3g using electronic balance was cleansed thoroughly with sandpaper to remove any oxide coating. The ribbon was fitted into the bottom of the crucible.
with oxygen was used to calculate the empirical formulae and to obtain the uncertainties. The tables are arranged in a chronological order of the process of data. With the process of data will produce the empirical formulae which will be used to compare with a theoretical value.
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