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A studen wanted to determine the value of R and so used the reaction: Mg(s) + 2 HCl(aq) → H2(g) + MgCl2 (aq) She got a piece of magnesium ribbon and determined its mass as 0.0841 g. She placed the ribbon in a test tube with water and excess HCl and inverted it to allow the H2 gas to bubble to the top of the tube while water was pushed out the bottom. She measured the volume of the gas in the tube as 87.8 mL. She measured the temperature of the water at 20.5ᵒC and the atmospheric pressure in the room was 751 torr. 1- What other piece of information did she have to determine in order to accurately calculate R? 2- What did she calculate for the value of R? 3- What was her % error?

A studen wanted to determine the value of R and so used the reaction: Mg(s) + 2 HCl(aq) → H2(g) + MgCl2 (aq) She got a piece of magnesium ribbon and determined its mass as 0.0841 g. She placed the ribbon in a test tube with water and excess HCl and inverted it to allow the H2 gas to bubble to the top of the tube while water was pushed out the bottom. She measured the volume of the gas in the tube as 87.8 mL. She measured the temperature of the water at 20.5ᵒC and the atmospheric pressure in the room was 751 torr. 1- What other piece of information did she have to determine in order to accurately calculate R? 2- What did she calculate for the value of R? 3- What was her % error?

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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A studen wanted to determine the value of R and so used the reaction: Mg(s) + 2 HCl(aq) → H2(g) + MgCl2 (aq)
She got a piece of magnesium ribbon and determined its mass as 0.0841 g. She placed the ribbon in a test tube with water and excess HCl and inverted it to allow the H2 gas to bubble to the top of the tube while water was pushed out the bottom. She measured the volume of the gas in the tube as 87.8 mL. She measured the temperature of the water at 20.5ᵒC and the atmospheric pressure in the room was 751 torr.


1- What other piece of information did she have to determine in order to accurately calculate R?


2- What did she calculate for the value of R?


3- What was her % error?

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