Polyethylene is a pure substance.
Polyethylene is a semicrystalline homogeneous polymer with a molecular weigh profile based upon the production chemistry. Common forms include HDPE, MDPE, LLDPE, LDPE, UHMWPE, etc.
Homogeneous mixture
A bowl of oatmeal is a heterogeneous mixture.
Sand+salt: a heterogeneous mixture.
Well, iron fillings can't really be a mixture, since there aren't two different substances here. ________________________ But to answer the question- 1. Iron Filings are homogeneous as they are of the same or similar kind (from the definition of homogeneous). 2. They are a homogeneous substance being a physical material which has discrete existence (from the definition of substance).
Gold is metal that is a homogenous mixture. It is not a heterogeneous mixture, because a heterogeneous mixture can be physically separated.
Homogeneous mixture
Homogeneous mixture
Sugar is a compound, which is a homogeneous substance, but not a mixture.
pure substance
heterogeneous and homogeneous is not the same so the substance is homogeneous and the mixture is heterogenous..
no
homogeneous have same substance in mixture.heterogeneous have two different substance.
I think it's a mixture.
Ca is an element. It is a pure substance, which, by definition, is homogeneous matter, but is not a mixture.
Liquid gold-homogeneous Solid-heterogenous
Neither, Oxygen is a pure substance not a mixture.
hetergeneous