What is the mass of 5 moles of sodium carbonate `(Na_(2)CO_(3))` ?
(Atomic masses : `Na = 32 u , C = 12 u , O = 16 u`)

What is the mass of 10 moles of sodium sulphite (Na_(2)SO_(3)) ?

Calculate the formula mass of sodium carbonate (Na_(2)CO_(3)) . (Given : Atomic masses : Na = 23 u, C = 12 u, O= 16 u )

(a) Define mole. What are the two things that a mole represents. (b) What weight of each element is present in 1.5 moles of sodium sulphate , Na_(2)SO_(3) ? (Atomic masses : Na = 23 u , C = 12 u , O = 16 u )

Calculate the formula mass of potassium carbonate (K_(2)CO_(3)) (Given : Atomic masses : K = 39u , C = 12 u , O = 16 u )

What is the mass of : (a) 1 mole of nitrogen atoms ? (b) 4 moles of aluminium atoms ? (c ) 10 moles of sodium sulphate (Na_(2)SO_(3)) ? (Atomic masses : N = 14 u, Al = 27 u , Na = 23 u , S = 32 u and O = 16 u )

Formula unit mass of K_(2) CO_(3) is (Atomic mass of K = 39 u , C = 12 u and O = 16 u)

Formula unit mass of K_(2) CO_(3) is (Atomic mass of K = 39 u , C = 12 u and O = 16 u)

What is the mass of 0.5 mole of wate (H_(2)O) . (Atomic masses : H = 1 u, O = 16 u )