How Many Sodium Ions Are Contained in 99

question 18

Multiple Choice

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

• 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

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Definitions:

Biceps Brachii

A muscle of the upper arm that flexes the elbow and rotates the forearm, consisting of two heads (long and short) originating from the shoulder and attaching to the forearm.

Flexor Carpi Ulnaris

A muscle of the forearm that acts to flex and adduct the wrist.

Metacarpal Bones

The five long bones in the hand that are connected to the carpals (wrist bones) and the phalanges (fingers).

Palmaris Longus

A muscle of the forearm that is involved in the flexion of the wrist and can be used as a tendon graft site.