What is the mass (in grams) of 9.56E+25 molecules of dinitrogen trioxide?

Question

How do you do this

Answer 1

1. dinitrogen trioxide (N₂O₃) has an atomic weight of 76 awu. So, 1 Mole will have 76g

 

2.Avogadro's number of 6.023x10²³ equals the number of molecules in 1 Mole.

 

3. 9.56x10²⁵ ÷ 6.023x10²³ ≅ number of Moles ≅ 1.587x10² Moles ≅ 158.7 Moles

 

4. 158.7 Moles x 76g/Mole ≅ 12,064g