What is the difference between a pure substance and an impure substance, on a molecular scale?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

For part 1, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least copper(ii) nitrate to the well with the most copper(ii) nitrate. which wells had the most distinct precipitate? for part 2, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least iron(ii) sulfate to the well with the most iron(ii) sulfate. which wells had the most distinct precipitate? for part 3, describe the changes in the colors of the well, if any, as you go from well 1 to well 9—that is, as you go from the well with the least iron(iii) nitrate to the well with the most iron(iii) nitrate. which wells had the most distinct precipitate?

Iput 40 points on !i need an a or my mom is gonna kill me! 1. what three characteristics does grain perfect fabric have? 2. what do you need to know to identify your pattern layout on the guide sheet? 3. define: pressing 4. define: interfacing 5. define: design seam 6. when should you preshrink your fabric?