Question

question 19 (1 point)
which of the following is a solution?
oil in water
sand in water
soil
pure gold
steel

Explanation:

A solution is a homogeneous mixture at the molecular level. Oil in water forms an emulsion (heterogeneous). Sand in water is a suspension (heterogeneous). Soil is a heterogeneous mixture. Pure gold is an element (not a mixture). Steel is a solid - solution (alloy) of iron and carbon (and sometimes other elements), making it a homogeneous mixture at the atomic level.

Answer:

Steel