How would you measure out five moles of a gas?

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Are oil and water a mixture or solution