How Many SO₃^2- Ions Are Contained in 99

question 104

Multiple Choice

How many SO₃^2- ions are contained in 99.6 mg of Na₂SO₃? The molar mass of Na₂SO₃ is 126.05 g/mol.

• A) 1.52 × 10²⁷ SO₃ ions
• B) 4.76 × 10²⁰ SO₃ ions
• C) 2.10 × 10²¹ SO₃ ions
• D) 1.05 × 10²¹ SO₃ ions
• E) 9.52 × 10²⁰ SO₃ ions

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Definitions:

Pelvic Girdle

The structure that attaches the legs to the axial skeleton.

Second Cervical Vertebra

Also known as the axis, it is a bone in the neck that allows the head to rotate.

Process

A series of actions or steps taken to achieve a particular end.

Crest

In anatomy, a crest refers to a prominent ridge or raised surface on the skeleton.