Question

How many moles are equal to 145g of sodium carbonate

Answer 1

There are

0.0642 mol Na

2

CO

3

in

6.80 g

Step-by-step explanation:

The chemical formula of sodium carbonate is

Na

2

CO

3

. The molar mass of sodium carbonate is

105.988439 g/mol

Answer 2

Moles = mass/RFM
RFM of Na2CO3 = 46 + 12 + 48 = 60 + 46 = 106
Moles = 145/106 = 1.37 moles (3sf)