Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter3: Molecules, Moles, And Chemical Equations
Section: Chapter Questions
Problem 3.92PAE: 3.92 Many chemical reactions take place in the catalytic con- verter of a car. In one of these...
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When small quantities of elemental hydrogen gas are needed for laboratory work, the hydrogen is often generated by chemical reaction of a metal with acid. For example, zinc reacts with hydrochloric acid, releasing gaseous elemental hydrogen: Zn (s) + 2HCl(aq) -> ZnCl2 (aq) + H2 (g) What mass of hydrogen gas is produced when 2.50g of zinc is reacted with excess aqueous hydrochloric acid?
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