1. What is Molar Activity of a Compound?

Definition: Molar activity is defined as the measured radioactivity per mole of compound.

Purpose: It helps researchers and scientists quantify the radioactivity concentration in chemical and biological compounds.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( A_m \) — Molar activity (Becquerel per mole)
• \( \lambda \) — Activity of radioactive substance (Becquerel)
• \( N_A \) — Avogadro's number (6.02214076 × 10²³ mol⁻¹)

Explanation: The activity (disintegrations per second) is multiplied by Avogadro's number to get the molar activity.

3. Importance of Molar Activity Calculation

Details: Accurate molar activity measurements are crucial in radiopharmaceuticals, tracer studies, and nuclear medicine applications.

4. Using the Calculator

Tips: Enter the activity in Becquerels (Bq). The value must be > 0. Avogadro's number is a constant (6.02214076 × 10²³).

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between activity and molar activity?
A: Activity measures disintegrations per second, while molar activity measures disintegrations per mole of substance.

Q2: What are typical units for molar activity?
A: Molar activity is typically expressed in Becquerels per mole (Bq/mol) or Curies per mole (Ci/mol).

Q3: Why is Avogadro's number used in this calculation?
A: Avogadro's number converts between the molecular scale (atoms) and the macroscopic scale (moles).

Q4: How do I measure the activity of a radioactive substance?
A: Activity is typically measured using radiation detectors like Geiger counters or scintillation counters.

Q5: Can this calculator be used for any radioactive compound?
A: Yes, as long as you know the activity of the sample, this calculation applies to any radioactive compound.