### braiin teaser .

**Knotty Notation**

A single drop of water (H2O) contains 1.7 quintillion molecules. In the chemistry lab, Gus is following a procedure that calls for him to add 30 drops of water to a solution. Gus must report how many hydrogen atoms he has added to the solution. He must write the answer in scientific notation.

What should Gus report?

## 2 Comments:

Marielle could you please explain to everyone what 1 quintillion is in scientific notation. I'm not even positive what the number is (how many zero's are there in one quintillion?)

Mr. R

i think there are 18 zeros in quintillion after the one..

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