Question

Calculate the formula unit mass
 Cacl2
 K2CO3

Answer 1

Answer:

(1) 111u ;  (2) 138u

Explanation:

1) CaCl2

Mass of Calcium (Ca) = 40u

Mass of Chlorine (Cl) = 35.5u

Total formula unit mass of the compound is,

40+2(35.5) = 40 + 71 = 111u

2)K2CO3

Mass of Potassium (K) = 39u

Mass of Carbon (C) = 12u

Mass of Oxygen (O) = 16u

Total formula unit mass of the compound is,

2(39) + 12 + 3(16) = 78 +12 +48 = 138u