The adult dose of a medication is 10 mg/kg of body weight.

• Convert pounds to kilograms: 220 lb ÷ 2.2 = 100 kg.

• Calculate dose: 10 mg/kg × 100 kg = 1000 mg.

• Convert mg to g: 1000 mg = 1 g.

Therefore, the correct dose is 1 g.

References (Pharmacy Technician documents / Study Guides):

• PTCB/ExCPT math sections—weight-based dosing, unit conversions (lb↔kg; mg↔g), ratio-proportion/dimensional analysis methods.

• Pharmacy calculations texts—standard conversion 1 kg = 2.2 lb, 1000 mg = 1 g.