Chemistry
Chemistry
7th Edition
ISBN: 9780321940872
Author: John E. McMurry, Robert C. Fay, Jill Kirsten Robinson
Publisher: PEARSON
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Mole Concept
Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can b…
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Chapter 10, Problem 10.74SP
Interpretation Introduction

Interpretation:

Consider the following reaction:

  Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)

Find out:
(a) The volume of H2 will form when zinc having mass 25.5 g, pressure 742 mm Hg and temperature 150C is allowed to react with zinc.
(b) The mass of zinc needed to prepare 5.00 g of H2 at 350 mm Hg pressure, having volume 5.00 L and temperature 30.0 0C.

Concept introduction:

Number of molecules present in gases can be calculated by multiplying the number of moles to the Avogadro’s number (Na). Mass can be calculated by using ideal gas equation first to calculate the number of moles than by using formula n=mM mass can easily calculated.

To determine:

The volume of H2 formed and the total grams of zinc needed to start preparing H2.

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Chapter 10 Solutions

Chemistry

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