The specific gravity of of gasoline i approximately .70?

Question

gasoline and kerosene(SG=.82) are blended to obtain a mixture with a specific gravity of .78. Calculate the volumetric ratio(vol of gas/vol of kerosene) of the two compounds i the mixture, assuming Vblend= V gas+ V kerosene

Answer 1

Assuming that your given specific gravities are correct,

Let;

M = Volume of the blend

G = volume of the gasoline

K = volume of the kerosene

(1). M = G + K

(2). 0.78M = 0.70G + 0.82 K

(3). G/K = C;

Multiplying Eq. (1) by 0.78

(4). 0.78M = 0.78G + 0.78K

Subtracting Eq.(2) from (4);

0 = 0.08G -0.04K

0.08G = 0.04K

C = G/K = 0.04/0.08 = 1/2