How Many Formula Units Are in a Sample of Rust

question 1

Multiple Choice

How many formula units are in a sample of rust, Fe₂O₃ that has a mass of 5.0 g?

• A)1.9 × 10²⁵
• B)0.031
• C)1.9 × 10²²
• D)0.070
• E)4.2 × 10²²

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Definitions:

Parkinson's Disease

A neurodegenerative disorder characterized by motor symptoms like tremors, rigidity, and bradykinesia, as well as non-motor symptoms.

Neurological Degeneration

The progressive loss of structure or function of neurons, including death of neurons, leading to diseases such as Parkinson's, Alzheimer's, and multiple sclerosis.

Semantic Memory

Long-term memory of general factual knowledge, social customs, and language.

Procedural Memory

Long-term memory of motor skills, habits, and ways of doing things, which can be recalled without conscious effort; sometimes called implicit memory.