A liquid mixture containing $10\mathrm{.}0wt\%$ n$-$octane and the balance $n-$decane flows into a tank mounted on a balance.

The mass in kg indicated by the scale is plotted against time.

That data fall on a straight line that passes through the points $(t=3\mathrm{.}00$min,$m=145kg)$ and $(t=14\mathrm{.}00,m=211kg).$

Estimate the volumetric flow rate of the liquid mixture.

What does the empty tank weigh?

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Hint

Calculate the density of the mixutre by assuming a basis of a mass of the mixture. Calculate the volume of that mixure. Then

calculate the density of the mixture.

Remember the difference between weight and mass.