Answer:
n=0.852 moles
Step-by-step explanation:
Given mass is, m = 19.6 g
The molar mass of sodium is, M = 22.99 u
We need to find the no of moles in 19.6 of Sodium. We know that, no of moles is equal to given mass divided by molar mass.
![n=(m)/(M)\\\\n=(19.6)/(22.99)\\\\n=0.852](https://img.qammunity.org/2021/formulas/chemistry/college/zbhcszek8cunhmxjowm145pv3o436ftjxj.png)
So, there are 0.852 moles in 19.6 g of Sodium.