4. Classify each substance by composition, first as mixture (MX) or a pure substance (PS): sugar granite bronze helium stainless steel Then each MX classify as physically homogeneous (hmg) or heterogeneous (htg), and each PS classify as element (E) or compound (C). For example: soil MX, htg water PS, c_

Is pure 24-carat gold a substance, element, and/or compound? Explain.

I have chosen to discuss the terms heterogeneous and homogeneous for this week's discussion. I have some familiarity with these two words and most of my familiarity is in terms of cooking. There are a lot of examples of heterogeneous and homogeneous mixtures in the kitchen. A heterogenous mixture is one made up of multiple individual components, like a chocolate chip cookie or a bowl of cereal and milk. While the ingredients are blended together, they are still visibly separate. A homogeneous mixture is one that blends to the point of no individual components being visible. An example of this could be simple syrup or a pitcher of sweet tea or lemonade. The terms heterogeneous and homogeneous refer to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree to which the materials are mixed together and the uniformity of their composition….just like as in the everyday usage of these terms. I feel like the similarities in the usage of…

Classify the following as either pure substances or mixtures. If it is a pure substance, state whether it is a compound or an element. If it is a mixture, state whether it is homogenous or heterogeneous. a.) Aluminum foil b.) Water c.) Salt Water  d.) Oil + Water  e.) Table Salt  f.) Air g.) Flour + Baking powder  h.) steel nails I.) Iron Pipe j.) Brass k.) 200 proof alcohol  l.) 10 carat gold

Is the mixture described in the table homogeneous or heterogeneous? Explain how you can tell.

Which property of rubbing alcohol is a chemical property? a) density (0.786 g/cm') b) flammability c) boiling point (82.5 °C) d) melting point (-89 °C)

Photographs are taken of falling drops of two different liquids: wind wind Liquid A Liquid B Note: the drops have identical volumes. Notice that the oncoming wind tends to flatten out each drop as it falls. What's different about liquids A and B? Your answer should be the one- or two-word name of a physical property.

Label the following as a pure substance or a mixture 

Aluminum is a useful metal because it can be rolled into thin sheets and bend into different shapes. A substance with this physical property is said to be .....

5. Indicate whether the following statements best describes a solid, liquid, or gas a. It has an indefinite shape but a definite volume. b. It takes the shape and volume of the container. c. The particles are packed closely together and have very little movement. d. The particles are far apart and move very rapidly. 6. Consider the following classifications of matter: heterogeneous mixture, homogeneous mixture, element, and compound. a. In which of these classifications must two or more substances be present? (There is more than one answer.) b. In which of these classifications is separation into simpler substances using physical means possible? (There is more than one answer.)