Chapter 1, Problem 1.23E

1. Metal Ore a. element b.compound c. mixture   2.  Grinding dried leaves into a fine powder a.chemical change b. physical change

When oil and water are mixed together they form a (an) a. Homogeneous mixture b. Heterogeneousmixture c. Compound d. Element

Measuring the mass and volume of a piece of chalk is a way of investigating its _____. A.Chemical and intensive properties B.Chemical and extensive properties C.Physical and intensive properties D. Physical and extensive properties   Water, table salt, and sugar are examples of _______. A.Mixtures c. Elements B. Compounds d. Solutions   Which is an example of a compound? A.Rust c. Carbonated Drinks B. Pure Gold d. Salt Solution   Which of the following statements best describe isotopes? A.Same number of neutrons, different number of electrons B.Same number of protons, different number of electrons C.Same number of protons, different number of neutrons D.Same number of neutrons, different number of protons   What is the charge of an atom's nucleus? A.positive c. negative B.no charge d. can be positive or negative   Which of the following subatomic particles has the smallest mass? A.proton c. nucleus B.neutron d. electron   What is the mass number of an atom which has 11 protons, 11…

Which substance can be separated by filtration?  A. Compound B. Element C. Mixture D. Solution Which is an example of physical property of matter? * A. Baking a cake B. Cooking of gelatin C. Melting of ice D. Rusting of metal Which is an example of chemical property of matter?  A. Digestion of food B. Evaporation of water C. Sublimation of moth balls D. Condensation of water vapor       Which is a physical property of matter? A. Combustibility B. Corrosiveness C. Density D. Reactivity

1. What pieces of apparatus or equipment are used for measuring: a. Temperature? b. Small amount of liquids? c. Large amount of liquids? d. Mass of a substance? 2. Suggest ways on how to store and handle properly the different glassware to avoid accidents in the laboratory. You can use illustrations to show your idea. 3. Why is the most of the containers of substances and those used for heating are made up of glass rather than metal? 4. Explain why the thermometer should not be shaken rigorously to lower the reading to zero before using it.

14. A researcher finds that a solid has high melting and boiling points, and is soluble in water. Based on this information, he(she) can believe that the substance is a(n) A. ionic compound B. molecular compound C. homogeneous mixture D. heterogeneous mixture E. flammable substance

What is a mixture? A. A solid gold ring B. Nitrogen and oxygen in a molecule C. Copper and lead reacting chemically

When discussing the physical properties of solids and liquids, which one of the following is not true? Group of answer choices A.The motion of the particles increases with an increase in temperature. B.Liquids and solids are composed of small particles. C.The basic particles have significant attractions for each other. D.The basic particles are far apart.

How would you classify the following material? coffee (black) a. solution b. an element c. suspension d.heterogeneous mixture