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, tine reacts with hydrochloric acid, releasing gaseous elemental hydrogen:
:math>
at mass of hydrogen gas is produced when 2.50 g of zinc is reacted with excess aqueous hydrochloride acid?
Interpretation:
The mass of hydrogen gas produced should be calculated.
Concept Introduction:
The reaction of zinc and hydrochloric acid to produced zinc chloride and hydrogen gas is as follows:
The mass of hydrogen gas produced can be calculated from the number of moles of hydrogen gas produced. This can be calculated from the number of moles of Zn reacting in the reaction.
From the above balanced chemical reaction, 1 mole of
The mass of
Here, m is mass and M is molar mass.
Molar mass of
Chemistry: An Atoms First Approach
General Chemistry - Standalone book (MindTap Course List)
Biology (MindTap Course List)
Understanding Nutrition (MindTap Course List)
Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)
College Physics
Fundamentals of Physical Geography
Biology: The Unity and Diversity of Life (MindTap Course List)
Inquiry into Physics
Chemistry In Focus
Chemistry & Chemical Reactivity
College Physics
Biochemistry
Introduction to General, Organic and Biochemistry
Human Biology (MindTap Course List)
An Introduction to Physical Science
Horizons: Exploring the Universe (MindTap Course List)
Physical Chemistry
Chemistry for Today: General, Organic, and Biochemistry
Chemistry for Engineering Students
Chemistry: Principles and Reactions
BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)
Cardiopulmonary Anatomy & Physiology
Biology: The Dynamic Science (MindTap Course List)
Human Heredity: Principles and Issues (MindTap Course List)
Nutrition Through The Life Cycle
Chemistry In Focus
Chemistry for Engineering Students
Organic Chemistry
Physics for Scientists and Engineers
Nutrition Through the Life Cycle (MindTap Course List)
Environmental Science (MindTap Course List)
General, Organic, and Biological Chemistry
College Physics
Environmental Science (MindTap Course List)
Organic And Biological Chemistry
Organic Chemistry
Chemistry & Chemical Reactivity
Physics for Scientists and Engineers: Foundations and Connections
Foundations of Astronomy (MindTap Course List)
Oceanography: An Invitation To Marine Science, Loose-leaf Versin
Physics for Scientists and Engineers, Technology Update (No access codes included)
Physics for Scientists and Engineers with Modern Physics
Biology: The Unity and Diversity of Life (MindTap Course List)