Question

An individual petri dish holds approximately 25 mL of media. The directions for pre-mixed Eosin Methylene Blue Agar require 36 g of media to be mixed with 1,000 mL. In order to prepare 140 petri dishes, how many grams of Eosin Methylene Blue are required? Report your answer in grams rounded to two decimal places

Answer 1

An individual petri dish holds approximately 25 mL of media.

So, for 140 petri dishes, we need 3,500 mL of media

140 x 25 = 3,500.

The directions for pre-mixed Eosin Methylene Blue Agar require 36 g of media to be mixed with 1,000 mL.

For 1000 mL of media, we have to add 36 g of Eosin Methylene Blue Agar.

For 3500 mL (140 petri dishes), we have to add 126 g of Eosin Methylene Blue Agar.

36 g for 1000 ml X for 3500 me X = 36 X 3500 1260 = 126

126.00 g of Eosin Methylene Blue Agar will be required for 140 petri dishes (3,500 mL).