How Many Sodium Ions Are Contained in 99

question 66

Multiple Choice

How many sodium ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃ is 126.05 g mol^-1.

• A) 1.52 × 10²⁷ sodium ions
• B) 4.76 × 10²⁰ sodium ions
• C) 2.10 × 10²¹ sodium ions
• D) 1.05 × 10²¹ sodium ions
• E) 9.52 × 10²⁰ sodium ions

---

Definitions:

Denitrification

A microbial process by which nitrogen in the soil is converted back into gaseous nitrogen, removing it from the ecosystem.

ENSO Event

A periodic variation in winds and sea surface temperatures over the tropical eastern Pacific Ocean, affecting climate globally (El Niño-Southern Oscillation).

Global Environment

Refers to the international context of environmental conditions, including climate change, biodiversity, and human impacts on Earth's ecosystems.

Soil Microorganism Respiration

The metabolic process by which soil microorganisms convert organic matter into carbon dioxide and energy.