Problema Solution
It is estimated that there are 210 billion trillion water molecules in a small container of water. Express the number of water molecules in scientific notation. Note that a "billion trillion" means a billion times a trillion. (1 billion equals=10 Superscript 9; 1 trillion equals=10 Superscript 12)
The number of water molecules in the container is approximately
Answer provided by our tutors
210 billion trillion = 210*(10^9)*(10^12) =
= 210*(10^(9 + 12)) = 210*(10^21) =
= 2.1*(10^(21 + 2)) = 2.1*(10^23)
The number of water molecules in the container is approximately 2.1*(10^23) .