Only question highlighting Chapter 2 • Problems87e inSkill-Building Exercises (grouped in similar pairs)2.18 State the mass law(s) demonstrated by the following experi-mental results, and explain your reasoning:Experiment 1: A student heats 1.00 g of a blue compound andobtains 0.64 g of a white compound and 0.36 g of a colorless gas.Experiment 2: A second student heats 3.25 g of the same bluecompound and obtains 2.08 g of a white compound and 1.17 g ofa colorless gas.2.19 State the mass law(s) demonstrated by the following experi-mental results, and explain your reasoning:Experiment 1: A student heats 1.27 g of copper and 3.50iodine to produce 3.81 g of a white compound; 0.96 g of iodineremains.gofeafExperiment 2: A second student heats 2.55 g ofсopperand 3.50of iodine to form 5.25 g of a white compound; 0.80ofсopperremains.2.20 Fluorite, a mineral of calcium, is a compound of the metalWith Tluorine. Analysis shows that a 2.76-g sample of fluoritecontains 1.42 g of calcium. Calculate the (a) mass of fluorine inthe sample; (b) mass fractions of calcium and fluorine in fluorite;(c) mass percents of calcium and fluorine in fluorite.2.21 Galena, a mineral of lead, is a compound of the metal withsulfur. Analysis shows that a 2.34-g sample of galena contains2.03 g of lead. Calculate the (a) mass of sulfur in the sample;(b) mass fractions of lead and sulfur in galena; (c) mass percentsof lead and sulfur in galena.2.22 Magnesium oxide (MgO) forms when the metal burns in air.(a) If 1.25 g of MgO contains 0.754 g of Mg, what is the mass ratioof magnesium to magnesium oxide?

Mass percent is a method of expressing concentration of the solution. amount of substance present…

2.20 Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.76-g sample of fluorite contains 1.42 g of calcium. Calculate the (a) mass of fluorine in the sample; (b) mass fractions of calcium and fluorine in fluorite; (c) mass percents of calcium and fluorine in fluorite.

2.20 Fluorite, a mineral of calcium, is a compound of the metal with fluorine. Analysis shows that a 2.76-g sample of fluorite contains 1.42 g of calcium. Calculate the (a) mass of fluorine in the sample; (b) mass fractions of calcium and fluorine in fluorite; (c) mass percents of calcium and fluorine in fluorite.

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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