By by domyessayscom Nearly every student anywhere in the world had to study some chemistry during their academic years.
The empirical formula of magnesium 1 1 MgO Percentage yield of magnesium oxide To find out how much magnesium has reacted with oxygen to produce the magnesium oxide, the percentage yield was determined.
The final value was the greatest percentage errors in Table 2. This does not mean that there were no uncertainties; it was only because the uncertainties were so small that when they were rounded up to 3 decimal places, they became 0.
Thus, when calculating the average, the results from Trial 4 were excluded. It is noticed that Ave. However, all the calculations were done by Excel and rounded up to 3 decimals. As a result, the Ave.
This graph shows the relationship of the composition of magnesium and oxygen within the compound, magnesium oxide. It can be seen that the amount of magnesium is proportional to the amount of oxygen.
The gradient of the line of best fit is 0. The positive gradient indicates that an increase in the amount of magnesium will result in a proportional increase in the amount of oxygen. There are outlier points in the graph.
The most obvious one could have affected the value of the gradient.
In addition, the correlation coefficient R2 is 0. This graph presents the same information as the graph shown above except that it excludes the most obvious outlier point 0. As a result, the gradient increased became 0.
Conclusion and Evaluation Conclusion and Justification According to the processed data, the hypothesis that the combustion of magnesium will generate data which can be used to calculate the empirical formula of magnesium oxide is supported because the molar ratios of magnesium and oxygen were managed.
As it is shown in Table 3.
However, it has to be noted that some of the results gained were controversial to each other, i. From Table 3 and Table 3.
Theoretically, the empirical formula for magnesium oxide should be MgO because MgO is an ionic compound. The outer shells of both ions will then be full so that they become stable like the noble gases.
That is to say, the molar ratio of magnesium and oxygen should be 1: Thus, the gradient of the scatter graph ought to be 1; though in the first graph the gradient is 0. After the elimination of the anomalous, the gradient became 0.
It can be deduced that the off-true-value gradient was caused by some outlier points.Your customer service is wow! I though I was difficult but there was always someone talking to me. You are prompt in dealing with issues when they arise.
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For example, if you want to find the molar mass of carbon, you would find the atomic mass of carbon on the periodic table, and this is equal to the molar mass in grams per mole.
So, in our example, carbon has a molar mass of 01 grams per mole. In conclusion the experimental value of the molar mass of oxygen is. To achieve this result, we wrote the chemical reaction, compared the ratio of mole between and, find the mole produced by water using the formula, calculate the molar mass from the mol value, calculate the % of individual elements in water, and finding oxygen’s molar mass.
The Ka and Molar Mass of a Monoprotic Weak Acid Essay Words | 7 Pages. The Ka and Molar Mass of a Monoprotic Weak Acid Chemistry Lab Professor: James Giles November 7, Abstract: The purpose of this experiment was to determine the pKa, Ka, and molar mass of an unknown acid (#14).
For example, if you want to find the molar mass of carbon, you would find the atomic mass of carbon on the periodic table, and this is equal to the molar mass in grams per mole. So, in our example, carbon has a molar mass of grams per kaja-net.com are a few exceptions to this rule.