Iit question on mole concept price problem?

Potash is any potassium mineral that is used for its

potassium content. Most of the potash produced in the

United States goes into fertilizer. The major sources of

potash are potassium chloride (KCl) and potassium

sulfate (K

2

SO

). Potash production is often reported

as the potassium oxide (K

4

O) equivalent or the

amount of K

2

2

O that could be made from a given mineral.

(a) If KCl costs Rs. 50 per kg, for what price (rupees

per kg) must K

2

SO

be sold to supply the same

amount of potassium on a per rupee basis? (b) What

mass (in kg) of K

2

4

O contains the same number of

moles of K atoms as 1.00 kg of KCl?