caffeine concentration

Question

If the caffeine concentration in a particular brand of soda is  drinking how many cans of soda would be lethal? Assume that 10.0 g of caffeine is a lethal dose, and there are 12 oz in a can.

Answer 1

You need to know the concentration of caffeine in the soda by a percent or a molarity. Let's say that you know molarity, M

The "deadly" amount of soda = 10 g C (1/ molar mass of C)(1/ molarity)

The units cancel as molar mass has units of g/mole and molarity is moles C/ liter of solution.

Then you have to convert liters to fluid ounces and divide by 12 oz/can to get number of cans.