Find the mass of (1) potassium which contains the same number of atoms as 5g of zinc and (2) iron which contains the same number of atoms as 75g of mercury

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements