Equal Masses of Hydrogen and Helium Gas Are at the Same

question 23

Multiple Choice

Equal masses of hydrogen and helium gas are at the same temperature in vessels of equal volume. The atomic mass of helium is four times that of hydrogen. If the total mass of both gases is the same, the ratio of the pressure of helium (He) to that of hydrogen (H2) is

• A) .
• B) .
• C)1.
• D)2.
• E)4.

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Definitions:

Horizontal Plane

A plane that divides the body into upper and lower parts.

Lymphatic System

A network of tissues and organs that help rid the body of toxins, waste and other unwanted materials, integral to the immune system.

Lymph Nodes

Small, bean-shaped structures in the lymphatic system that act as filters for harmful substances.

Pineal Gland

A small, pinecone-shaped endocrine gland in the brain that produces melatonin, a hormone that regulates sleep patterns.