Our bodies are approximately 60% water. Using the assumption that our bodies are completely water, and the average person weights around 75kg, how many molecules are there in the human body?
Our bodies are approximately 60% water. Using the assumption that our bodies are completely water, and the average person weights around 75kg, how many molecules are there in the human body?
Think about the following equations:
1. moles = mass/Mr.
2. moles = number of molecules/Avogadro's constant.
Approximately, yes. I'm guessing you used 18 for the Mr value of water rather than 18.02? My answer is off by only a few decimal places so your answer would still be accepted unless the examiners had supplied the Ar of each element in the question and you failed to use it correctly.
Approximately, yes. I'm guessing you used 18 for the Mr value of water rather than 18.02? My answer is off by only a few decimal places so your answer would still be accepted unless the examiners had supplied the Ar of each element in the question and you failed to use it correctly.
Yap I used 18 And no the Ar wasn't given ! Thanks for your help !!!!