Question

TITOLUL LICE
The mass of carbon present in 0.5 mole of
K4 [Fe(CN)6 is
(a) 7.8 gm
(b) 36 gm
(0) 3.9 gm
(d) 39 gm​

Answer 1

I think it is K4[Fe(CN)]6 (Potassium ferrocyanide)

Molar mass of Given compound is 368.35 g/mol.

molar mass means mass of 1 mole of substances.

1 mole Potassium ferrocyanide contains 12 x 6 grams of carbon.

0.5 moles contains 12 x 3 = 36 grams of carbon.