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NORTHWEST CHEM 24114 - Chemistry Quiz

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M_1.1-1.2 Classification of Matter and Atomic ViewM_1.5-1.6 Properties and States of MatterM_1.1-1.2 Classification ofMatter and Atomic ViewQuestion 1Match each of the following to classify as a pure substance or a mixture:1. A sugar solution with sugar crystals at the bottom  mixture2. liquid water and steam at 100 degrees Celsius  pure substance3. Lead (Pb)  Pure substance4. a sand containing quartz (silicone dioxide) and calcite (calcium carbonate)  mixture Question 2All of the following are elements except:1. Calcium Carbonate (calcite) 2. silicon (Si) 3. potassium (K) 4. iodide (I2)5. magnesium (Mg) Question 3Match each to the correct classification:1. Methane (which burns in pure oxygen to form carbon dioxide and water)  compound2. Air (composed mainly of nitrogen and oxygen)  Homogeneous mixture3. Platinum  element4. Freshly squeezed orange juice  Heterogeneous mixture Question 4"Chunky Peanut Butter would be classified as which of the following?5. an element 6. a compound 7. homogeneous mixture 8. heterogeneous mixture Question 5Sucrose (C12H22O11), which is commonly known as table sugar would be classified as which of the following?1. an element 2. a compound 3. homogeneous mixture 4. heterogeneous mixture Question 6Freshly brewed coffee would be classified as which of the following?1. an element 2. a compound 3. homogeneous mixture 4. heterogeneous mixture Question 7Matter can be represented at the atomic level as being composed of individual units. The smallest unit is an atom that is represented by a circle, and different types of atoms will be shown as different colors. Units that are formed by chemically combining atoms are called molecules. Looking at the figure below select the appropriate description of the contents of container A:1. an element 2. a compound 3. a mixture of compounds 4. a mixture of elements Question 8Looking at the figure below select the appropriate description of the contents of container B:1. an element 2. a compound 3. a mixture of compounds 4. a mixture of elements Question 9Looking at the figure below select the appropriate description of the contents of container C:1. an element 2. a compound 3. a mixture of an element and a compound 4. a mixture of compounds 5. a mixture of elements Question 10Which of the following elements is not diatomic in nature?1. oxygen 2. chlorine 3. hydrogen 4. nitrogen 5. carbon M_1.5-1.6 Properties and States of MatterQuestion 1All of the following represent a physical changeEXCEPT:1. iron is transformed into rust in the presence of air and water 2. water is frozen 3. gasoline is evaporated 4. water is heated up 5. aluminum melts at 660 degrees celsiusQuestion 2Given that "Intensive Properties" do not depend on the amount of matter, all of the following describe intensive properties of a substance EXCEPT:1. The substance has a density of 1.28 g/mL 2. The substance freezes at -24 degrees Celsius 3. The substance conducts electricity 4. The sample has a mass of 3.28 g Question 3Indicate whether each of the following is a physical or chemical property of hydrogen gas (H2):1. At room temperature, it's density is less than any other gas.  Physical 2. It reacts violently with oxygen to form water.  Chemical 3. Liquefied hydrogen boils at a very low temperature (-253 deg C)  Physical 4. Hydrogen gas does not conduct electricity.  Physical Question 4In each of the following examples, indicate whether the data is qualitative or quantitative:5. The density of sodium is greater than kerosene and less than water.  Qualitative6. The density of copper (Cu) is 8.96 gramsper cubic centimeter.  Quantitative7. Sodium metal is shiny and malleable  Qualitative 8. The yellow solid melted at 128 deg C.  Quantitative Question 5How would you describe the change depicted in the figure below?1. A mixture of two gaseous compounds is heated to a temperature at which one of them decomposes.2. A mixture of two gaseous elements reacts together to form two compounds, one of which is a liquid.3. A mixture of two gaseous elements is cooled to a temperature at which one ofthe condenses (transforms from a gas toa liquid). 4. A mixture of two gaseous elements undergoes


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NORTHWEST CHEM 24114 - Chemistry Quiz

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