Question

A certain solution has a hydrogen ion concentration of 3.54 x 10−5 moles per liter. Write this number in standard notation.

Answer 1

Hey!

It looks like you got scientific notation, the exponent tells how how much should we move the decimal points. A positive exponent means we should move it to the right. A negative exponent means that we should move it to the left. In this problem we have this:

$3.54*10^-^5$
So, let's move the decimal place 5 places to the left, our number would be...
$=0000354$

Thanks!
-TetraFish