A pure substance (Element or Compound)
compounds = fixed composition of atoms.
substance...im pretty sure..
elements
a solution?
A pure substance has a fixed and uniform composition.
I want to know that composition of R55 cast steel percentage.
No. A pure substances has a definite and constant composition.
I think so or maybe not. But if you add one more element then it will be mixture.
Element
No to both.
A pure substance has a fixed and uniform composition.
A fixed composition is not a characteristic of a mixture. The composition of a mixture can vary, unlike the composition of a compound that forms a chemical reaction.
A compound has a fixed composition and is always a homogeneous pure substance.
Mixtures don't necessarily have fixed composition
Today the laws of definite proportions and multiple proportions, applied to chemical compounds, are considered as not genarally valid.Many mixtures (not all !) have a fixed composition depending on the specific application and recipe.
No, the composition is variable - excepting of course specific recipes.
Here is an excerpt from this site explaining kiln texturing:1. A method of making a mold with a textured mold surface comprising the steps of: coating a mold surface of the mold with a fusible inorganic enamel composition, then applying a particulate inorganic material to the unfused enamel composition coating, and heating the enamel composition to fix the particulate material in place thereon and to harden the enamel composition, then applying a second coating of inorganic enameling composition of thickness to the coated mold surface and particulate material so that the surface of the second coating reflects the texture of the hardened enamel composition with the particulate material fixed thereon. * http://www.freepatentsonline.com/4956200.html
A substance
Material with a granitic composition that erupts at the surface is called rhyolite.
composition and material
substance