![]() The periodic table lists the atomic mass of carbon as 12. If you were given a sample of a cotton ball and a glass stirring rod with identical mass (ex: 5. The molar mass of any substance is its atomic mass, molecular mass, or formula mass in grams per mole. Which item in Data Table 1 contains the largest quantity of moles? BI V T? Tz O Word(s) 4. Show all work to answer this question by uploading an image of your calculations into Photo 1. Then, calculate the moles and atoms of each element in the sample of sugar. Record each step needed to calculate the moles and atoms of all elements present in the sample. A sample of 2 tsp of sugar (C12H22011) weighs 9.00 g. Describe the relationship between moles and atoms. 11 Repeat steps 8-9 for the cotton ball.Įxperiment 1 Exercise 1 Data Table 1 Photo Data Table 1: Moles and Atoms Common Items Item Formula Moles of Sample (mol) Moles of Each Element (mol) Molar Mass (g/mol) 26.982 Mass of Sample (g) 2.36 Atoms of Each Element AI: AI AI: Aluminum Cup Glass Stirring Rod SIO 01.08 Si: Si: O: O: Cotton Ball CeH100. For the purpose of this exercise, it will be assumed your cotton ball consists of simple glucose molecules. Note: Cellulose is a complex carbohydrate consisting of 3,000 or more glucose (C6H1005) units. Then, lookup atomic weights for each element in periodic table: H: 1.00794, F: 18. Use the periodic table to determine the molar mass of this compound and record in Data Table 1. Computing molar mass step by step First, compute the number of each atom in HF 181: H: 1, F: 181. 10 The cotton ball is composed primarily of cellulose, a polymer of glucose, C8H1005. с Number of atoms of Si and O present in the glass stirring rod. b Number of moles of Si and O present in the glass stirring rod. Number of moles of SiO2 present in the glass stirring rod. 9 Calculate each of the following and record your findings Data Table 1. 8 Place the glass stirring rod on the scale and determine its mass. For the purpose of this exercise, it will be assumed your sample contains only silicon dioxide. Note: Glass is composed of additional compounds such as sodium oxide, sodium carbonate, and calcium oxide. Use the periodic table to determine the molar mass of this compound and record in Data Table 1. The periodic table shows that the atomic mass (rounded to two decimal points) of Al is 26.98, so 1 mol of Al atoms has a mass of 26.98 g. 7 The glass stirring rod is composed primarily of silicon dioxide, SiO2. O Number of atoms of Al present in the aluminum cup. Multiply the number of atoms by the atomic weight of each element found in steps 1 and 2 to get the mass of each element in Cu (C2H3O2)2: Molar Mass (g/mol) Cu (Copper) 1 × 63.546 63.546. Number of moles of Al present in the aluminum cup. 6 Calculate each of the following and record your findings in Data Table 1. Record the mass of the aluminum cup in Data Table 1. 5 Place the aluminum cup on the scale and determine its mass. 4 Turn on the digital scale and ensure that it displays 0.00 g. ![]()
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