Name Chem 10 Section Lab Partner Experiment Date Lab Report Introducing Measurements in the Laboratory Part A Measuring the Dimensions of Regular Geometric Shapes Experimental Data Shape Dimensions Measurement Significant Figures Length Rectangle Width Circle Diameter Data Analysis 1 Perform the conversions indicated below Show your work and report your answers in scientific notation a Convert the measured rectangle length to pm b Convert the measured circle diameter to km 2 Calculate the areas of your rectangle and circle in cm2 Show your work and report your answers to the correct number of significant figures a Area of rectangle b Area of circle 3 Convert the area of your circle to m2 Show your work and report your answer in scientific notation Page 1 of 4 Part B Measuring the Volume of a Sample of Water Experimental Data Measuring Device Volume Measurement Significant Figures 100 mL Beaker 100 mL Graduated Cylinder Data Analysis 1 Compare your volume measurements in the table above Which instrument the beaker or the graduated cylinder provides the more precise measurement Explain 2 Convert the volume of water obtained using the graduated cylinder to hm3 Show your work and report your answer in scientific notation Part C Measuring the Mass of Solids Experimental Data Table 1 Mass of an Erlenmeyer Flask Measuring Device Mass Measurement Significant Figures Mass Measurement Significant Figures Triple Beam Balance Electronic Balance Table 2 Weighing by Difference Mass of Empty Beaker Mass of Beaker Sugar Page 2 of 4 Data Analysis 1 Compare your mass measurements obtained for the Erlenmeyer flask in Table 1 Which balance triple beam or electronic provides the more precise measurement Explain 2 Consider the data you obtained in Table 2 a Calculate the mass of sugar weighed out Show your work b Circle one When performing the above calculation significant figures decimal places are the primary consideration 3 Perform the conversions indicated below Show your work and report your answers in scientific notation a Convert the mass of the sugar weighed out to fg b Convert the mass of the sugar weighed out to Gg Part D Measuring the Melting Point of an Unknown Solid Experimental Data Unknown Compound ID Code Measured by Melting Point Significant Figures Group 1 You and your partner Group 2 Group 3 Group 4 Average Value Page 3 of 4 Data Analysis 1 Using the average value above identify your unknown compound see Procedure Part D 7 Name of Compound True Melting Point 2 Which of the measured melting points recorded in the table was the most accurate Explain 3 Calculate the percent error between the experimental melting point that you and your partner measured and the substance s true melting point Report your answer to the correct number of significant figures 4 Perform the temperature conversions indicated below Show your work and report your answers to the correct number of significant figures a Convert the true melting point of your compound to K b Convert the true melting point of your compound to F Page 4 of 4
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