A heterogeneous mixture contains multiple chemical substances combined in a non-uniform way, whereas a pure substance contains molecules with only one chemical identity. For example, salt is a pure substance, whereas a mixture of salt an rocks is a heterogeneous mixture.
A pure substancs doesn't contain impurities.
The components of a homogeneous mixture are not visible.
The components of a heterogeneous mixture are easily identifiable.
They are a heterogeneous mixture.
Neither. Helium is not a mixture at all, it is a pure substance.
Pure Substance.Hg stands for mercury. A pure substance is made of only one type of atom or molecule. Since mercury is an element, 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.
CO2 is a pure substance and so is homogeneous. Hint: if it has a chemical formula then it is a pure substance.
pure substance
It is a heterogeneous mixture
It is a heterogeneous mixture
Pure substance; it is one form of pure carbon.
No, it is a heterogeneous mixture
They are a heterogeneous mixture.
They are a heterogeneous mixture.
Neither, its a pure substance
Homogeneous mixture
no
Homogeneous mixture
Neither, Oxygen is a pure substance not a mixture.