A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and the volume was adjusted so that the gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.00 L to 4.50 L

Answer : The mass of helium added to cylinder were, 4.50 grams.

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,

As we know that:

As the gas is same that is helium gas. So the molar mass will be same.

Thus the formula will be:

where,

= initial volume of gas  = 2.00 L

= final volume of gas =  4.50 L

= initial mass of gas  = 2.00 g

= final mass of gas  = ?

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

Therefore, the mass of helium added to cylinder were, 4.50 grams.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

it's c (engineer's do their work with mechanical stuff not on any living being)