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#19 please show work

#19 please show work

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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#19 please show work 

Expert Solution
Step 1 : General Information

You have the following reaction -

 Mg(s) + 2HCl(aq) => MgCl2(aq) + H2(g)

Step 2 : Solution A

Given that -

25 mL of 3 M HCl

Let's find the no of moles of HCl in this volume using formula - 

Mole = Molarity * Volume (L)

Mole of HCl = 3.0 * 0.025 

Mole of HCl = 0.075 mol

According to above balanced reaction, for 2 mole of HCl, one mole of Mg reacts. thus,

Here, mole of Mg reacting = 0.0752 = 0.0375 Mol

Now, Mass of Mg can be given as -

Mass of Mg = Mole * Molar mass

Mass of Mg = 0.0375 * 24.31 g

Mass of Mg = 0.9116 g

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