Question

Please explain how to get this answer step by step​

Answer 1

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

Step-by-step 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