A sample of 1.7×10^23 molecules of silicon is moles.

0.28moles of silicon

Explanation:

Given parameters:

Number of molecules of silicon  = 1.7 x 10²³molecules

Unknown:

Number of moles of the silicon  = ?

Solution:

A mole of any substance contains the Avogadro's number of particles.

   1 mole of a substance contains 6.02 x 10²³molecules;

  So;

     1.7 x 10²³molecules contains   = 0.28moles of silicon

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.

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