A cylinder has a piston at one end that can be moved in or out to change the volume of gas inside. The other end is fitted with a valve. Initially the cylinder contains 2.95 mol of an ideal gas. The piston is now pushed in to decrease the volume of gas to one-third its initial value without causing any change in temperature. In order to keep the pressure constant as well, how many moles of gas need to be released through the valve

0.974 moles

Explanation:

Avogadro's law states that the volume of a given mass of gas is directly proportional to the number of moles present as long as the temperature and pressure are held constant.

Now from the question;

V1 = V

n1 = 2.95

V2 = 1/3 V or 0.33 V

n2 = ?

V1/n1 = V2/n2

V1n2 = V2n1

n2 = V2n1/V1

n2 = 0.33 V * 2.95/V

n2 = 0.974 moles

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them  

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