Question

can you please help me please ​

Answer 1

Answer:

Explanation:

because in case of iron sulphide compound they are formed by reaction and in case of mixture they are formed by soln in mixture they in powder form they not react chemically and in case of formation of compound they formed by a chemical reaction.

Air is a mixture and not a compound because: Air does not have a formula like a mixture, while compounds have a fixed formula. When air is formed by gases, there is no energy change. Properties of air are variable and subjective to time and place.

Water is a compound because it is made up of water molecules. There is no such thing as water atoms. Water molecules are made of hydrogen and oxygen atoms, in the definite proportion of two hydrogens for one oxygen.

Compound Mixture

Definition compound-compound contains atoms of different elements chemically combined together in a fixed ratio.

mixture=A mixture is a combination of two or more substances where there is no chemical combination or reaction.

Composition Compounds contain different elements in a fixed ratio arranged in a defined manner through chemical bonds. They contain only one type of molecule. Elements that compose the compound are chemically combined.

Mixtures contain different elements and compounds but the ratio is not fixed nor are they combined via chemical bonds. The ingredients are physically mixed but chemically separate. Often they are visibly distinct.

Ability to break down A compound can be separated into simpler substances by chemical methods/reactions.

A mixture can be separated into simpler substances by physical or mechanical methods.

Examples Water (H2O), Sodium chloride (NaCl), Sodium bicarbonate (NaHCO3) etc.

Salt in water; pasta and sauce; sand; pebbles; solutions such as rubbing alcohol, dental amalgam, vapor in air; colloids such as mayonnaise, milk, cheese; coarse suspensions such as mud in water, oil in water.

Representation A compound is represented using its chemical formula that represents the symbols of its constituent elements and the number of atoms of each element in one molecule of the compound.

Mixtures cannot be represented by chemical formulas.