In chemistry class, Carlos calculated the number of molecules in 100 moles. The calculator displayed the number 6.0225.

Question

What is the number of molecules in 100 moles in scientific notation? (1 point)
• 6.02 × 1025
• 25 × 106.02
• 6.02 × 25
• 6.02 + 1025

Answer 1

To find the number of molecules in 100 moles, Carlos would use Avogadro's number, which is approximately \( 6.022 \times 10^{23} \) molecules per mole.

To calculate the number of molecules in 100 moles:

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

Thus, the number of molecules in 100 moles in scientific notation is:

\[ 6.02 \times 10^{25} \]

So the correct answer is: • 6.02 × 10²⁵