Question

Topic: Week 1 plans x LON-CAPA Chapter 1 Ho X ? ? c Not secure loncapautmedu/res/utm jebensh/ 121 Chl/Chapter%201%20Homework problem-13 pps Design Custom Tean Wholesale Premium4 OWG Wheels 18 irResuts for umbrellaMy Drive -Google 2008 Cheoy For each material, select whether it is a pure substance, homogeneous mixture, or heterogeneous mixture Coffee | Mouthwash BrasS Aluminum Uranium Vegetable oil Italian salad dressing Subemilt Answer Tries 0/s Problem 14 For each scenario, select whether a chemical change or a physical change has occured Metal left outside begins to rust. Hot glass breaks when placed in cold water A cake is baked Hydrofluoric acid etches glass. Proteins are broken down into amino acids Submit Answer Tries 0/s Problem 15 For each species, select the option that describes the species Sodium chloride (Naci) Copper (Cu) Argon (Ar) Hydrochloric acid (HCI) Gold (Au) Sulfur (Ss) Iron(Il) oxide (Fe203) O Type here to search

Answer 1

13. description

granite - heteogeneous mixture

coffee - homogeneous mixture

mouthwash - homogeneous mixture

brass : homogeneous mixture

aluminium : pure substance

uranium : pure sunstance

vegetable oil : Homogeneous mixture

italian salad dressing : Heterogeneous mixture

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14. changes

metal begins to rust : chemical change

hot glass breaks : Physical change

A cake is baked : physical change

HF etched glass : chemical change

proteins broken into amino acid : chemical change

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15. description

NaCl : ionic compound

Cu : metal

Argon : gas

HCl : acid

Gold : metal

Sulfur : pure solid

Fe2O3 : compound