Question

How many moles are in 3.45 g of Na2O?Round your answer to three significant

figures. IN A FINAL EXAM HURRY PLEASE

Answer 1

Answer: There are 0.056 moles present in 3.45 g of
`Na_(2)O`.

Step-by-step explanation:

Given : Mass = 3.45 g

Moles is the mass of substance divided by its molar mass.

Hence, moles of
`Na_(2)O` (molar mass = 61.98 g/mol) is as follows.

`Moles = (mass)/(molar mass)\\= (3.45 g)/(61.98 g/mol)\\= 0.056 mol`

Thus, we can conclude that there are 0.056 moles present in 3.45 g of
`Na_(2)O`.