Natural air is always a mixture, and more or less homogenous in its major constituents. However, if the balloon was inflated by mouth, it will have less oxygen and more carbon dioxide than the air outside the balloon, which is also a mixture.
pure substance?
No, it is a mixture; rarely a drug is a pure substance.
pure substance
Pure substance
Helium is an element (and therefore a pure substance) yes
Natural air is always a mixture, and more or less homogenous in its major constituents. However, if the balloon was inflated by mouth, it will have less oxygen and more carbon dioxide than the air outside the balloon, which is also a mixture.
pure substance?
Pure substance.
No, it is a mixture; rarely a drug is a pure substance.
No a mixture is by definition not a pure substance.
It is a mixture of substances
pure substance
pure substance, propanone
rice pudding a pure substance or a mixture and is it a homogenous or heterogenous
pure substance
Pure Substance