You have 10g of Sodium Carbonate, how many moles do I have to 2dp?

Sodium Carbonate is Na₂CO₃The molecular formula mass is 2xNa + 1xC + 3xO 2x23 + 1x12 + 3x16 = 106 g/mol m = 10g Mr = 106 g/moln=m/Mrn = 10/106 = 0.09 mol