Answer : The given number in scientific notation will be,

Explanation :
Scientific notation : It is the representation of expressing the numbers that are too big or too small and are represented in the decimal form with one digit before the decimal point times 10 raise to the power.
For example :
90000 is written as

999.9 is written as

As we are given that the number is, 0.000000655 ml
This number is written in scientific notation as :

Hence, the given number in scientific notation will be,
