Parts Per Million

[researcher88]

I have made calculations with other students and would like to get an "absolute sure answer". We are all not really sure about our answer as they all differ.

 

An adult needs 12mg of zinc per day.

An average oyster contains 200 ppm of zinc.

How many oysters are required to fulfill the daily intake of zinc for an adult?

 

Respond if you’re absolute sure.

 

Thanks!

[Skye]

For solutions or mixtures, parts per million is a weight for weight ratio, eg. mg/g, so the oysters have 200 mg/g of zinc. How many oysters you need depends on how much each weighs, which isn't given.

[researcher88]

That was what I thought at the beginning but I wasn't provided with that information. However the mass of zinc is there.