The cache is NOT at the above co-ordinates.
For many years, the term "dihydrogen monoxide" has been used to fool people into believing that a familiar and every day substance - one that is vital to life on earth - should be banned.
This hoax seeks to illustrate how the lack of scientific knowledge can cause people to fear something without fully understanding what it is they actually fear.
DHMO is just one of the scientific names given to this familiar substance, others being hydrogen oxide, hydrogen hydroxide, hydroxlic acid and oxidane. All sound somewhat scary and foreign until we're actually told what it is.
To solve this cache, you need to look at the below diagram and separate the DH from the MO in each of the four beakers.
Scientifically, this experiment should really be performed at 4° Celsius as this is when DHMO is at its most dense. This will help to reveal the co-ordinates of the cache.
It will be located at S35°MO E149°DH