A Rock Contains an Element with a Molar Mass of 40.08

question 2

Multiple Choice

A rock contains an element with a molar mass of 40.08 g/mol.If 9.28 × 10²⁴ atoms of this element were found in the rock, how many grams of the unknown element are present in the rock?

• A)618 g
• B)1.49 × 10²⁸ g
• C)2.24 × 10⁵⁰ g
• D)0.38 g
• E)3.80 g

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Definitions:

Tympanic Membrane

A thin layer of tissue that separates the outer ear from the middle ear and vibrates in response to sound waves.

Malleus

A tiny ossicle located in the middle ear that conveys sound waves from the tympanic membrane to the anvil.

Stapes

The smallest bone in the human body, located in the middle ear, transmitting sound vibrations from the middle ear to the inner ear.

Incus

An anvil-shaped small bone in the middle ear that transmits sound vibrations from the malleus to the stapes.