Asteel container with a movable piston contains 2.00 g of helium which was held at a constant temperature of 25 °c. additional helium was pumped into the container and the piston adjusted so that the gas pressure remained constant. how many grams of helium were added to the cylinder if the volume was changed from 2.00 l to 3.00 l? a) 0.700 gb) 2.00 gc) 1.8 gd) 1.00 ge) 9.7 gf) 5.63 gg) 4.63 g

D) 1.00 g

Explanation:

According to the Avogadro's law, the volume of gas is directly proportional to the number of moles of gas at same pressure and temperature. That means,

or,

where,

= initial volume of gas  = 2.00 L

= final volume of gas = 3.00 L

= initial moles of gas  =

= final moles of gas  = ?

Now we put all the given values in this formula, we get

Mass of helium =

Thus mass of helium added = (3.00-2.00) g = 1.00 g

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.