A scientist measures the standard enthalpy change for this reaction to be - 758.0 kJ/mol: 2NO(g) + 2 H2(g) –N2(g) + 2 H2O(1) Based on this value and the standard formation enthalpies for the other substances, the standard formation enthalpy of NO(g) is kJ/mol.​

i had this on my unit activity, i can you if you are a plato student. are you a plato student?

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).