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Myron

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Submitted By myronwilliams11
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I. Title: The Mole II. Purpose: To determine the number of atoms on a piece of galvanized iron and approximate the thickness in atoms of the coating III. Equipment: Reagents: 10 mL graduated cylinder 6 M HCl 150 mL beaker galvanized iron Balance Crucible tongs IV. Procedure: 1. Obtain a square or rectangular piece of galvanized iron which is 2 or 3 cm on an edge. Measure its length, width, and mass as precisely as your instruments permit. Record data. 2. Place the metal in a 150 ml beaker and add about 10 mL of 6 M hydrochloric acid. When the reaction has reached the stage where only a few bubbles of gas has been removed. Rinse the metal with water and dry it well. 3. Weigh and record the mass of the iron core V. Data:

VI. Calculations 1. What: The mass of zinc coating
How: Subtraction
Calc: 1.6815-1.6071=0.0744 g 2. What: Moles of iron
How: Factor labeling
Calc: 55.85 g Fe/1 x 1/1 =55.85 g Fe 3. What: Moles of zinc in coating
How: factor labeling
Calc: 0.0744g /1 x 1/1 4. What: Mole ratio of zinc to iron
How: Moles and zinc/moles of iron
Calc: 65.39/55.85= 1.170 5. What: Atoms of zinc on 2 sides
How: Factor Labeling
Calc: 65.39 g/1 x 6.022 10x23/1 6. What: Atoms of iron
How: Factor Labeling
Calc: 55.85 g/1 x 6.022 10x23/1 7. What: Ratio of zinc to iron atoms
How: Ratio
Calc: 5.585 10x25/ 6.539 10x25 =.8541 8. What: Mass of zinc on one side
How: division
Calc: 0.0744/2= 0.0372 9. What: Volume of zinc on one side
How: volume equation
Calc:
10. What: Thickness of zinc coating (cm)
How: Volume equation
Calc:
11. What: Thicness of zinc coating (A)
How: conversion of cm
Calc:
12. What: Thickness of zinc coating in atoms
How: Finding the diameter of atoms
Calc:
13. What: Experimental mass of a zinc atom
How:
Calc:

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