Users' questions

Is clean air a mixture?

Is clean air a mixture?

Clean air is a mixutre and not a compound. It has oxygen, hydrogen, carbon dioxide, water vapour, etc in various proportions. Hence, it is a homogeneous mixture of different gases.

What type of mixture is clean air?

homogeneous mixture
Air is a homogeneous mixture because it is made up of several different gases. The air we breathe has a composition of 78.09% nitrogen, 20.95%…

Is air a pure substance Why?

– Air is not supposed to be considered as a pure substance. Because air is a mixture of different gases. – Air mostly contains nitrogen and oxygen in about 78% and 20% respectively. Note: Elements and compounds have a constant composition throughout and can thus be said as pure substances.

Is Clean air homogeneous or heterogeneous?

Air is a homogeneous mixture of two or more components as it is made of gases that have uniform composition and are distributed uniformly throughout. The air that we breathe is a homogeneous mixture of oxygen, nitrogen, argon, and carbon dioxide, along with other elements in smaller amounts.

Is a mixture of air and liquid air a pure substance?

A mixture of ice and liquid water, for example, is a pure substance because both phases have the same chemical composition. So, Air is a pure substance with chemical composition of 78% of nitrogen, 21% of oxygen, 0.93% of argon, 0.04% of carbon dioxide and 0.01% other gases.

What happens when a substance is not chemically pure?

If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture. A) Tea is a solution of compounds in water, so it is not chemically pure.

What happens when you mix two pure substances?

If we take two or more pure substances and mix them together, we refer to this as a mixture. Mixtures can always be separated again into component pure substances, because bonding among the atoms of the constituent substances does not occur in a mixture.

How to classify a substance according to its composition?

Identify each substance as a compound, an element, a heterogeneous mixture, or a homogeneous mixture (solution). Decide whether a substance is chemically pure. If it is pure, the substance is either an element or a compound. If a substance can be separated into its elements, it is a compound.