In Seawater, Mg²⁺ Is About 1350 Mg Mg²⁺/L

question 53

Multiple Choice

In seawater, Mg²⁺ is about 1350 mg Mg²⁺/L. How many grams of magnesium are in a pool that is 25 ft by 12 ft by 6 ft? (1 ft = 12 inches and 1 inch = 2.54 cm)

• A) 4.78 × 10² g
• B) 74.1 g
• C) 6.88 × 10⁴ g
• D) 6.88 × 10⁷ g
• E) 1.64 × 10³ g

---

Definitions:

Cingulated Cortex

A part of the brain situated in the medial aspect of the cerebral cortex, involved in processing emotions and behavior regulation.

Hippocampus

A major component of the brain, crucial for memory formation and spatial navigation.

Hypothalamus

A region of the brain that regulates many bodily functions including hunger, temperature, and hormonal activity.

Amygdala

A part of the brain involved in processing emotions, including fear, anxiety, and aggression.