If the caffeine concentration in a particular brand of soda is 3.91 mg/oz, drinking how many cans of soda would be lethal?

Question

Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

Answer 1

Dimensional analysis

3.91 mg / oz x 12 oz / can x 1 g / 1000 mg = 0.0469 g caffeine / can

10.0 g caffeine x 1 can / 0.0469 g caffeine = 213 cans of soda