Agas with constant temperature has a pressure of 4 atm this pressure changes to 0.2 atm causing the volume to increase to 500l what was the initial volume of the gas

Explanation:

The problem can be solved using Boyle's law for the volume and pressure of a gas at constant temperature:

Where the quantities with sub-index 1 are the initial conditions for the gas and the quantities with sub-index 2 are for the final conditions of the gas.

We want to know the initial volume, this is:

we also know from the problem that

Thus, the initial volume V1 is:

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2