No It is not a pure substance because it contains more than one element.
CO2 is a pure substance and so is homogeneous. Hint: if it has a chemical formula then it is a pure substance.
Ca is an element. It is a pure substance, which, by definition, is homogeneous matter, but is not a mixture.
If it is pure iron then it is considered to be a homogeneous mixture. Homogeneous is when a substance is the same thing throughout.
Neither. Helium is not a mixture at all, it is a pure substance.
Pure substance; it is one form of pure carbon.
pure substance
Homogeneous mixture
The difference between a homogeneous mixture and a pure substance is that a pure substance has a fixed composition and cannot be separated because it is chemically bonded and a homogeneous mixture can be separated.
Homogeneous mixture
Pure substance; it is one form of pure carbon.
Neither. Oxygen is an element, which is a pure substance and not a mixture.
CO2 is a pure substance and so is homogeneous. Hint: if it has a chemical formula then it is a pure substance.
Homogeneous mixture. RMKP
It depends. You can have a gaseous mixture such as air, which would be a homogeneous mixture. But a single gas such as oxygen or methane would be a pure substance.
It is homogeneous, but it is not a mixture. It is an element, which is a pure substance.
Sulfur is not a mixture at all. It is a pure substance. Specifically it is an element.
It is not a mixture at all. It is a pure substance, an element to be specific.