Answered: Which of the following values for R2…

Which of the following values for R2 shows the strongest correlation between the X and Y values in a data set? 0.0184 0.0047 0.500 0.981 0.9678

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter6: Random Errors In Chemical Analysis

Section: Chapter Questions

Problem 6.7QAP

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Matter and Measurement

In the universe, there is matter, energy, and void space. The universe contains energy and void space. The definition of matter can be considered as something which possesses mass and consumes space. Chemistry is that branch of science which deals with the study of matter. Under chemistry, nature, composition, and the changes occurring to matter are discussed.

Question

Which of the following values for R² shows the strongest correlation between the X and Y values in a data set?

		0.0184
		0.0047
		0.500
		0.981
		0.9678

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Chemistry Heat of Solution (ΔHsoln) for NH4NO3 TRIAL 1 TRIAL 2 Mass of NH4NO3: (NH4NO3 = 80.05 g/mol): 5.06g 5.01g Volume of Water (mL): 50 mL 50 mL Temperature (°C): 1 min: 22.7°C 22.8°C 2 min: 22.7°C 22.8°C 3 min: 22.7°C 22.8°C 4 min: 14.6°C 22.8°C 5 min: 15.6°C 16.0°C 6 min: 16.0°C 16.0 °C 7 min: 16.0°C 16.0 °C 8 min: 16.2°C 16.2 °C ΔT = (Tfinal - Tinitial): 6.5 6.6 Mass of Calorimeter + Solution (g): 226.22g 226.48g Mass of Calorimeter empty (g): 174.58g 175.04g Mass of Solution (g): 51.64g 51.44g CALCULATIONS PART A: qcalorimeter(cal) = (0.961 cal/g °C) · (m) · (ΔT): cal cal qreaction=-qcalorimeter= cal cal #moles NH4NO3: mol mol ΔHsoln=(qreaction/moles NH4NO3: cal/mol cal/mol Average ΔHsoln(NH4NO3) cal/mol cal/mol %error= % % qreaction=- qcalorimeter.
Is this correct or does the true value need the same sig figs as the estimated value?