Make the following conversion.

420 hg = cg

42
42
0.0420
0.00420

1 hectogram = 10,000 centigrams

So just take 420 and times it by 10,000 this should give you 4,200,000 the first answer.

Hope this helps :)

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).