In the Laboratory,hydrogen Gas Is Usually Made by the Following

question 124

Multiple Choice

In the laboratory,hydrogen gas is usually made by the following reaction:
Zn(s) + 2 HCl(aq) → H₂(g) + ZnCl₂(aq)
How many liters of H₂ gas,collected over water at an atmospheric pressure of 752 mm Hg and a temperature of 21.0°C,can be made from 1.566 g of Zn and excess HCl? The partial pressure of water vapor is 18.65 mm Hg at 21.0°C.

• A)0)0428 L
• B)0)573 L
• C)0)585 L
• D)0)599 L

Understand the process of balancing chemical equations.

Learn about the stoichiometry of reactions and calculation of molar masses.

Grasp the concepts of limiting reactant and theoretical yield in chemical reactions.

Understand the role of forensic evidence in crime investigation and the challenges it may face.

---

Definitions:

Breathing

The physiological process of inhaling oxygen and exhaling carbon dioxide from the atmosphere.

Respiration

The physical process of acquiring oxygen and releasing carbon dioxide.

Adenoviral Pneumonia

A respiratory illness caused by adenoviruses, characterized by inflammation and infection of the lungs.

Correct Code

The accurate numerical or alphanumerical representation used for diagnosis, procedures, and billing in healthcare.