How can you distinguish an element, from a compound, from a solution, from a heterogeneous mixture? Explain

most of the materials around us are composed of mixtures of pure substances. What do you call a combination of two or more pure substances in which each pure substance retains its characteristic properties?

Write a balanced chemical equation for each of the following. Express your answer as a chemical equation. Identify all of the phases in your answer.  Gaseous butane (C4H10) reacts with oxygen gas to form carbon dioxide gas and water vapor.    Liquid methanol (CH3OH) reacts with oxygen gas to form carbon dioxide gas and water vapor.

Which of the following is not an example of a chemical property and why? 1. An iron nail will rust in water 2. Sugar will dissolve in water 3. A steak on a hot frying pan will turn brown. 4. Gasoline will burn if ignited 5. Water can be decompos to hydrogen and oxygen.

Fact, Law, Hypothesis, or Theory? __ An object less dense than the air flies up on its own. __ Atoms make and break chemical bonds by transferring or sharing their valence electrons to satisfy the octet rule. __ A firework is seen to burn with a green flame.

combination: Mg(s) + O2 (g) → Express your answer as a complete chemical equation, with reactants and products. Ie the phases in your answer.

4. What is the difference between a mixture and a pure substance?

How are the properties of a compound related to those of the elements that comprise it?

Atom of different elements can join together to from a new substance called a

Suppose the densities of two metals are so close together that density is difficult to use to be able to distinguish them within the margin of error (a good example would be zinc and tin). What other physical properties could you use to determine which metal was which? Explain your reasoning thoroughly.