Question

answer the following. (a) a certain solution has a hydrogen ion concentration of 7.25×10^(-6) moles per liter. (b) an african bush elephant can weigh up to 28,000 pounds. write this number in scientific notation. (a) moles per l (b) pounds

Explanation:

Step1: Recall scientific - notation form

Scientific notation is written as $a\times10^{n}$, where $1\leq a < 10$ and $n$ is an integer.

Step2: For part (a)

The number $7.25\times 10^{-6}$ is already in scientific notation.

Step3: For part (b)

To write 28000 in scientific - notation, move the decimal point 4 places to the left. So, $a = 2.8$ and $n=4$. The number in scientific notation is $2.8\times 10^{4}$.

Answer:

(a) $7.25\times 10^{-6}$
(b) $2.8\times 10^{4}$