Use the References to access important values if needed for this question. A skate board is found to have a length of 93.9 centimeters. Using unit analysis, show what the length of the skate board is in inches. 93.9 cm x == in Drag and drop your selection from the following list to complete the answer: 12 in 100 cm 2.54 cm 1 in 2.54 in 1 m Submit Answer Retry Entire Group 4 more group attempts remaining

Use the References to access important values if needed for this question. A skate board is found to have a length of 93.9 centimeters. Using unit analysis, show what the length of the skate board is in inches. 93.9 cm x == in Drag and drop your selection from the following list to complete the answer: 12 in 100 cm 2.54 cm 1 in 2.54 in 1 m Submit Answer Retry Entire Group 4 more group attempts remaining

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter1: Basic Concepts Of Chemistry

Section: Chapter Questions

Problem 62RGQ: You set out to determine the density of lead in the laboratory. Using a top loading balance to...

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You set out to determine the density of lead in the laboratory. Using a top loading balance to determine the mass and the water displacement method (Study Question 41) to determine the volume of a variety of pieces of lead, you calculate the following densities: 11.6 g/cm3, 11.8 g/cm3, 11.5 g/cm3, and 12.0 g/cm3. You consult a reference book and find that the accepted value for the density of lead is 11.3 g/cm3. Calculate your average value, percent error, and standard deviation of your results.
You can analyze for a copper compound in water using an instrument called a spectrophotometer. [A spectrophotometer is a scientific instrument that measures the amount of light (of a given wavelength) that is absorbed by the solution] The amount of light absorbed at a given wavelength of light (A) depends directly on the mass of compound per liter of solution. To calibrate the spectrophotometer, you collect the following data: Plot the absorbance (A) against the mass of copper compound per liter (g/L), and find the slope (m) and intercept (b) (assuming that A is y and the amount in solution is x in the equation for a straight line, y = mx + b). What is the mass of copper compound in the solution in g/L and mg/mL when the absorbance is 0.635?
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