What is the percent of nitrogen (N) by mass in a 55.0 g sample of Fe(NO3)3? The molar mass of Fe(NO3)3 is 241.86 g/mol. 1. 9.55 g
2. 9.55%
3. 5.80 g
4. 52.2%
5. 17.4 g
6. 5.80%
7. 17.4%
8. 52.2 g

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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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).

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.