CHEM136-Lab B-1

# CHEM136-Lab B-1 - Nadine Leah Hurd CHEM-136 Professor Boyke...

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Unformatted text preview: Nadine Leah Hurd CHEM-136 Professor Boyke January 29, 2008 Conversion Factors in Calculations Pre-lab Study Questions 5. What is an equality and how is it used to write a conversion factor? An equality is a relationship between two units that measure the same quantity. Equalities are used to write a conversion factor when the equality is written in fraction form. The equality helps to convert a given unit in to a different unit. Report Sheet - Lab 2 A.2 Area Your measurements Length = 13.02 cm Width = 6.67 cm Area = (13.02)(6.67) = 86.84 cm Why could two students obtain different values for the calculated areas of the same rectangle? Two students could obtain different values for the calculated areas of the same rectangle depending on what digit the student decided to round to. A.3 Volume of A Solid by Direct Measurement Shape of solid Cube Formula for volume of solid V = L Volume of the solid V = (6) = 216 cm (Show calculations of volume including the units) Questions and Problems Q.1 What is the total mass in grams of objects that have masses of 0.2000 kg, 80.0 g, and 524 mg? 0.2000 kg X 1000 g = 200 g 1 kg 524 mg X 1 g = 0.524 g 1000 mg Total Mass = 200 g + 0.524 g + 80.0 g = 280.524 g Q.2 A beaker has a mass of 225.08 g. When a liquid is added to the beaker, the combined mass is 238.254 g. What is the mass in grams of the liquid?238....
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CHEM136-Lab B-1 - Nadine Leah Hurd CHEM-136 Professor Boyke...

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