Consider a mixture of air and gasoline vapor in a cylinder in a piston. The original volume is 40cm^3. If the combustion of this mixture releases 950j of energy to what volume will the gas expand at a constant pressure of 650torr. If all energy of combustion is converted into work to push back the piston?

Answer : The number of drops pf the stock solution mist be added are, 50 drops.

Explanation :

As we are given that the concentration of stock solution 1 mg/mL and pipette delivers 20 drops/mL. That means,

1 mg of epinephrine = 1 mL = 20 drops

The final volume of Locke's solution = 25 mL

and the final concentration needed =

As, 1 mL of solution contains =

So, 25 mL of solution contains =

Conversion used :

Now we have to determine the number of drops needed.

As, 1 mg of epinephrine contains 20 drops.

So, 2.5 mg of epinephrine contains 2.5 × 20 = 50 drops.

Therefore, the number of drops pf the stock solution mist be added are, 50 drops.