compounds, elements, or hetero/homo mixtures?

Question

Classify steel and explain your reason... thanks...

Answer 1

Steel is a solid mixture of iron with another metal or carbon. The amounts are variable as is the additional metal. They are chosen for their properties.
This mixture is a solution, which is a homogeneous mixture called an alloy.
They are melted together. They do not react together and form a compound. The parts of a mixture keep their own properties.

Answer 2

a) a blue-colored, single-phase liquid that when boiled away (evaporated) leaves behind a solid residue heterogeneous mixture homogeneous mixture CORRECT compound element (b) a "cloudy" liquid that separates into two layers upon standing overnight heterogeneous mixture homogeneous mixture CORRECT (before it stands and separates, then it is no longer a mixture) compound element (c) a nonuniform, white crystalline substance, part of which dissolves in alcohol and part of which does not dissolve in alcohol heterogeneous mixture CORRECT homogeneous mixture compound element (d) a colorless gas that cannot be separated into simpler substances using physical means and that reacts with the metal magnesium to produce both a magnesium oxygen compound and a magnesium-nitrogen compound heterogeneous mixture homogeneous mixture compound element IF THE QUESTION SETTER WAS THINKING OF AIR, A HOMOGENEOUS MIXTURE, THEY WERE WRONG ABOUT IT "CANNOT BE SEPARATED............ IT CAN BY THE PHYSICAL PROCESS OF FRACTIONAL DISTILLATION. THE ONLY OTHER, UNLIKELY, POSSIBILITY IS THAT IT WAS AN OXIDE OF NITROGEN.....A COMPOUND

Answer 3

Steel is an alloy, ie a mixture of basically the elements iron and a bit of carbon, both in the solid state.

Answer 4

Steel is an alloy. It is an homogenous substance.