Question

in chemistry class, Carlos calculated the number of molecules in 100 moles. the calculator displayed the number 6.02E25. What is the number of molecules in 100 mole in scientific notation?


6.02 times 25
6.02 + 10^25
6.02 times 10^25
25 times 10^6.02

Answer 1

The correct way to express the number of molecules in 100 moles in scientific notation is:

**6.02 times 10^25**

So, the correct option is:

**6.02 times 10^25**

This is based on Avogadro's number, which is approximately \(6.022 \times 10^{23}\) molecules per mole. Therefore, for 100 moles:

\[
100 \, \text{moles} \times 6.022 \times 10^{23} \, \text{molecules/mole} = 6.022 \times 10^{25} \, \text{molecules}
\]

When rounded appropriately, this is displayed as approximately \(6.02 \times 10^{25}\).