Please explain how to get this answer step by step

The answer to your question is 4.72 x 10²⁵ molecules or 472.87 x 10²³ molecules

Explanation:

Data

number of molecules = ?

number of moles = 78.51 moles of N₂O₅

Process

To solve this problem remember the one mol of any substance equals the Avogadro's number (6.023 x 10²³).

1.- Use proportions and cross multiplication to find the answer.

                        1 mol of N₂O₅ 6.023 x 10²³ molecules

               78.51 moles of N₂O₅   x

                        x = (78.51 x 6.023 x 10 ²³) / 1

                        x = 4.72 x 10²⁵ molecules or 472.87 x 10²³ molecules

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.

thats a little if u want the answer just look it up on google thats what i do haha : )