INTRODUCTION
Chemistry deals with the principles that govern the changes matter may go through. It also the branch of Science that deals with the properties and the composition of matter. Chemistry is the science that touches our body starting from the smallest parts of atoms up to the substantial parts of our body. So basically, our knowledge in chemistry is beneficial to us, humans and other organisms, since it will help us to understand the dangers and benefits of this world. Stoichiometry is the part or section in chemistry that comprises the relationships of reactants and products of a reaction to establish it into needed quantitative data. In this part of chemistry, we need to apply our knowledge about the atomic masses of the different
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So what is the difference between these two? Well, based on the word “empirical,” we can basically say that the Empirical Formula of a compound is the simplest formula of the compound. It only shows the proportions of the elements which compose the compound but not the actual number of the organization of atoms in the said compound. While the Molecular Formula of a compound is the formula that shows the actual amount of the atoms of the elements that comprise the compound. Did you understand the difference between the two? Well, we can simplify the difference between the two formulas by expressing it …show more content…
a. If the given are expressed in percentages, follow the steps for Situation A and then proceed to Step 2 of this Situation.
b. If the given are expressed in grams, follow the steps for Situation B and then proceed to Step 2 of this Situation.
2. The last thing that calculated is the Empirical Formula of the compound. The next step is to find the integer that will be multiplied to the Empirical Formula for it to be the Molecular Formula of the compound. To find the integer, first, we need to get the total molar mass of the Empirical Formula.
3. After getting the mass of the Empirical Formula, divide the given molar mass of the compound by the total mass of the Empirical Formula.
4. If the value that you calculated in step 3 has decimal places that are between 0.11 to 0.89, then you need to find a number that will be multiplied by the value to remove the decimal places. (Note: Do not forget to observe proper significant figures based on the given.)
5. After getting the value that is a whole number with no decimal places, it will be the integer that will be multiplied to the Empirical Formula. After multiplying the integer to the subscripts of the Empirical Formula, the Formula of the compound that you will get will serve as the Molecular Formula of the
Describe which of the reactions were controls and if they provided the expected results. Use the data in Data Table 1 to support your answer. Answer- In this exercise the positive control was solution E because it contained glucose which would test positive for sugar. The negative controls would be solutions
The theoretical mass of ethyl salicylate to be obtained was 1.667 grams and the actual mass obtained was 0.600 g.
Number of moles of maleic anhydride = 0.3g ma* (1 mol ma)/(98.016g ma) = 0.00306mol ma
The mass of Mg + the mass of O2=mass of MgxOx. Knowing the mass of
... while weighing the reactants would try and avoid letting the reagents get in contact with apparatus that may not be necessary so as to avoid loss of some the substance and this way the exact mass would be achieved.
2Li : H2 2 : 1 ratio 0.0154 : 0.077 Lithium = 0.0154 moles Relative atomic mass of Lithium. Ar = MASS _0.
Mass of O = Mass of crucible, cover, KClO3 and MnO2 after heating (Step # 11) - Mass of crucible, cover, KClO3 and MnO2 before heating (Step # 5)
Mass Pb(NO2)3/ MW Pb(NO3)2 to find the mass of SO4, which equaled 0.1394g, then plugged into the percentage was exactly 55.75% SO4. The begging of the experiment requested that the percentage of SO4 in their fertilizer sample be found and that is exactly what was accomplished by this experiment, and the outcome, demonstrating the ability of my group to preform the requested task presented by the
Stoichiometry is a chemical branch that studies amounts of substances that are involved in reactions. Stoichiometry will help you to find out how much of the mixture you will need, or how much you started with. The calculations of a stoichiometry problem depends on a balanced chemical equations. The factors of the balanced equations signifies the molar ratio (the number of moles of each reactant needed to form a certain numbers of moles of each product) of the reactants and products taking part in the reaction. From the atomic and molecular point of view the stoichiometry in a chemical reaction is very simple. For example, one mole of oxygen reacts with two moles of hydrogen,
From the unit of chemistry in grade ten science, the students have learned many things from different types of elements in the chart all the way to how each element impacts the daily life each student or even adult lives in. Some of the things I as a student have learned include how to draw the different elements in a bohr rutherford diagram, balancing chemical equations, types of chemical reactions, and even information about the different types of acids and bases. Although there were many other things in the unit, these four definately helped me learn about chemistry in a more in-depth way, as well as teaching me something very new since these were some things a few of the students had never done in the previous years. Learning this in the classroom has really opened my eyes to the world in which we live in today, many times I leave the house on a cold day and as I look upon the cold water becoming ice or even the snow falling down, I know how it is happening, why it is happening, and I can even picture the molecules solidifying as we had seen in class with many different diagrams.
Therefore, the Number of moles × molecular mass = mass of the sugars in grams in 10 mL of distilled water (with uncertaintyof ±0.2 mL on the graduated cylinder)
...o lakes and killing fish and the harmful chemicals we breathe from plastics. Therefore, scientists all over the world study organic compounds for research to get as many benefits as they can and to stop the harmful effects of using organic compounds. Scientists test how food should be stored and prepared so we do not get sick. Nutritionists study the proper diet for maximum chemical processes in the body. Environmental scientists show how human activity affects the environment. Forensic scientists test samples from people, plants and soil to find contamination or poisons. Even in the jungles of the Amazon, the people know how to use organic compounds to heal sicknesses. They may not call it organic chemistry, but essentially it is the same thing, the study of carbon compounds. As long as there is life on earth, there will always be a place for organic chemistry.
First, the mass of the beaker being used was recorded, then about 1g of baking soda was added and the mass recorded. Next, the mass of just the baking soda was found and recorded. Then, the contents were boiled until dry then weighed and mass recorded after cooling off. Finally, the mass of jus the salt, or sodium chloride, was found and recorded.
B. i ask that you should think about these precautions and take them into thought