What Mass of ¹⁴C (Having a Half-Life of 5730 Years)

question 44

Multiple Choice

What mass of ¹⁴C (having a half-life of 5730 years) do you need to provide a decay rate of 280.0 Bq? (1 u = 1.6605 × 10^-27 kg)

• A) 1.70 × 10^-12 kg
• B) 5.38 × 10^-19 kg
• C) 3.84 × 10^-20 kg
• D) 8.68 × 10^-13 kg

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Definitions:

Sulfonium Salts

Ionic compounds containing a positive sulfonium ion (R3S+), where R represents an organic group.

Alkylating Agents

Chemicals that add alkyl groups to DNA or proteins, often used as medications in chemotherapy or as chemical weapons.

Sulfur Analogues

Compounds similar in structure to another compound but with sulfur atoms replacing oxygen or nitrogen atoms, often used in medicinal chemistry to adjust the properties of drugs.

Ethers

A class of organic compounds characterized by an oxygen atom connected to two alkyl or aryl groups, used as solvents and in the synthesis of other chemicals.