How Many Moles of Aluminum Are Needed to Make 9

question 110

Multiple Choice

How many moles of aluminum are needed to make 9 moles of molecular hydrogen? Given the reaction:
2 Al + 6 HCl → 2 AlCl₃ + 3H₂

• A)2 moles
• B)3 moles
• C)4 moles
• D)6 moles
• E)none of the above

Identify basic principles of bearing wear and material suitability.

Recognize commonly used abbreviations and symbols in mechanical engineering drawings.

Understand the specifications and designations for threads, including UNC and metric systems.

Understand the basic requirements and designations for bearings and their applications in machinery.

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