Matter And Safety Review Quiz

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  • 1/20 Questions

    Anything that has mass and takes up space is _________.

    • Matter
    • Volume
    • Pressure
    • Weight
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About This Quiz

The 'Matter and Safety Review Quiz' assesses knowledge of matter, its properties, and basic chemistry calculations. It covers physical and chemical properties, density calculations, and unit conversions, essential for students in chemistry and physics courses.

Matter And Safety Review Quiz - Quiz

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  • 2. 

    A characteristic that can be observed or measured without changing the sample's composition is ________________.

    • A chemical property

    • A physical property

    • A gaseous property

    • A crystalline property

    Correct Answer
    A. A physical property
    Explanation
    A physical property is a characteristic of a substance that can be observed or measured without changing the composition of the sample. This means that even if we measure or observe the physical property, the substance will still remain the same. Examples of physical properties include color, density, melting point, boiling point, and conductivity.

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  • 3. 

    When one substance changes identity, it exhibits a(n) __________.

    • Chemical property

    • Physical property

    • Extensive property

    • Intensive property

    Correct Answer
    A. Chemical property
    Explanation
    When one substance changes identity, it exhibits a chemical property. Chemical properties are characteristics of a substance that can only be observed or measured when a chemical change occurs. These properties describe how a substance reacts with other substances, such as its ability to burn, rust, or decompose. In contrast, physical properties describe the characteristics of a substance that can be observed or measured without changing its identity, such as color, density, or melting point. Extensive properties depend on the amount of substance present, while intensive properties do not.

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  • 4. 

    Classify as a physical or a chemical property. Iron is more dense than aluminum.

    • Chemical

    • Physical

    Correct Answer
    A. Physical
    Explanation
    The given statement "Iron is more dense than aluminum" refers to a comparison of the densities of iron and aluminum. Density is a physical property of a substance that describes the mass per unit volume. In this case, the statement is comparing the densities of two different elements, iron and aluminum. Since density is a characteristic that can be measured and observed without changing the chemical composition of the substances, it is considered a physical property. Therefore, the correct answer is physical.

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  • 5. 

    Classify as a physical change or a chemical change. water freezing and forming ice

    • Physical

    • Chemical

    Correct Answer
    A. Physical
    Explanation
    Water freezing and forming ice is classified as a physical change because it involves a change in the state of matter from a liquid to a solid, but the chemical composition of water remains the same. In this process, the water molecules slow down and come closer together, forming a solid structure. The freezing of water can be reversed by melting the ice, demonstrating that no new substances are formed during this change.

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  • 6. 

    Classify the following as a physical or a chemical change. Iron and oxygen form rust

    • Chemical

    • Physical

    Correct Answer
    A. Chemical
    Explanation
    The formation of rust when iron and oxygen combine is considered a chemical change. This is because the reaction between iron and oxygen results in the formation of a new substance, rust. In a chemical change, the composition of the substances involved is altered, and new substances are formed with different properties. In this case, the iron reacts with oxygen to form iron oxide, which is the chemical name for rust.

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  • 7. 

    Two items that must be worn during any laboratory experiment are ___________.

    • Safety goggles and a lab apron

    • Safety goggles and fire-proof mitts

    • Gloves and a lab apron

    • Rubber gloves and a face shield

    Correct Answer
    A. Safety goggles and a lab apron
    Explanation
    During a laboratory experiment, it is essential to wear safety goggles to protect the eyes from any potential hazards such as chemicals or flying objects. Additionally, a lab apron should be worn to protect the body and clothing from spills or splashes of chemicals. Therefore, the correct answer is safety goggles and a lab apron.

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  • 8. 

    When a laboratory session ends, you must always ___________.

    • Wash your hands

    • Wash your eyes in the eye-wash fountain

    • Take a shower in the chemical hazard shower

    • Eat or drink in the laboratory

    Correct Answer
    A. Wash your hands
    Explanation
    After a laboratory session, it is important to wash your hands to maintain proper hygiene and prevent the spread of any chemicals or contaminants that may have been encountered during the session. Washing hands helps to remove any potential harmful substances and reduce the risk of contamination or infection.

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  • 9. 

    A sample of gold has a mass of 15.7 g and displaces 0.81 cm3 of water in a graduated cylinder. What is the density of gold? Density = mass/volume

    • 0.05 g/cm3

    • 0.81 g/cm3

    • 14.9/g/cm3

    • 19.3 g/cm3

    Correct Answer
    A. 19.3 g/cm3
    Explanation
    The density of a substance is calculated by dividing its mass by its volume. In this case, the mass of the gold sample is given as 15.7 g and the volume of water displaced by the gold sample is given as 0.81 cm3. By dividing the mass (15.7 g) by the volume (0.81 cm3), we can calculate the density of gold. The result is 19.3 g/cm3, which is the correct answer.

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  • 10. 

    Which of the following numbers is equal to 2.70 x 10-4?

    • 0.00027

    • 0.675

    • 27x10-3

    • 270

    Correct Answer
    A. 0.00027
    Explanation
    The correct answer is 0.00027 because when we multiply 2.70 by 10 raised to the power of -4, we move the decimal point 4 places to the left, resulting in a value of 0.000027.

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  • 11. 

    Identify each physical property as extensive or intensive. mass

    • Intensive

    • Extensive

    Correct Answer
    A. Extensive
    Explanation
    Mass is an extensive physical property because it depends on the amount of matter present in an object. The more matter an object has, the greater its mass will be. Extensive properties are additive, meaning they can be added or subtracted when objects are combined or separated. In contrast, intensive properties, such as density or temperature, do not depend on the amount of matter and remain constant regardless of the quantity of the substance.

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  • 12. 

    Which of the following is a compound?

    • Water

    • Neon

    • Steel

    • Crude oil

    Correct Answer
    A. Water
    Explanation
    Water is not a compound because it consists of only one type of atom, which is oxygen and hydrogen. A compound is a substance formed by the chemical combination of two or more elements in definite proportions. In the case of water, it is a molecule composed of two hydrogen atoms and one oxygen atom, making it a simple molecule or a pure substance.

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  • 13. 

    Classify as a physical change or a chemical change. leaves changing colors in the fall

    • Physical

    • Chemical

    Correct Answer
    A. Chemical
    Explanation
    The process of leaves changing colors in the fall is a chemical change. This is because the pigments in the leaves undergo a chemical reaction, breaking down and changing their composition, resulting in the vibrant colors that we see. It is not a physical change because the change in color is not reversible and involves a transformation at the molecular level.

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  • 14. 

    Which of the following is a pure substance?

    • Soda

    • Gun powder

    • Sugar water

    • Steam

    Correct Answer
    A. Steam
    Explanation
    Steam is a pure substance because it consists of only one type of molecule, which is water vapor. It does not contain any impurities or other substances mixed in it. Unlike soda, gun powder, and sugar water, which are all mixtures of different substances, steam is a single component and therefore qualifies as a pure substance.

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  • 15. 

    Identify each physical property as extensive or intensive. melting point

    • Intensive

    • Extensive

    Correct Answer
    A. Intensive
    Explanation
    The melting point of a substance is an intensive physical property. Intensive properties do not depend on the amount of substance present and remain constant regardless of the quantity. In the case of melting point, it is the temperature at which a substance changes from a solid to a liquid state, and this temperature does not change with the amount of substance being melted.

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  • 16. 

    Classify as a physical or a chemical property.  Oil and water do not mix.

    • Chemical

    • Physical

    Correct Answer
    A. Physical
    Explanation
    The fact that oil and water do not mix is classified as a physical property. This is because it is a characteristic that can be observed without changing the chemical composition of the substances. It is a property that describes the behavior or interaction of the substances, rather than a change in their chemical structure.

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  • 17. 

    Use the conversion factor above to find the meters in 2.7 x 103 kilometers. 1 km = 1000 m

    • 2.7 x 10^5 m

    • 2.7 x 10^-3 m

    • 2.7 m

    • 2.7 x 10^6 m

    Correct Answer
    A. 2.7 x 10^6 m
    Explanation
    The given conversion factor states that 1 kilometer is equal to 1000 meters. To find the number of meters in 2.7 x 10^3 kilometers, we can multiply 2.7 x 10^3 by the conversion factor. This gives us 2.7 x 10^3 km * 1000 m/km = 2.7 x 10^6 m. Therefore, the answer is 2.7 x 10^6 m.

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  • 18. 

    Identify each physical property as extensive or intensive. density

    • Intensive

    • Extensive

    Correct Answer
    A. Intensive
    Explanation
    Density is an intensive physical property because it does not depend on the amount or size of the substance being measured. It remains the same regardless of the quantity of the substance.

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  • 19. 

    Which of these is not a homogeneous mixture?

    • Sugar dissolved in water

    • Oxygen and nitrogen gases in the air

    • Oil and vinegar salad dressing

    • A silver mercury amalgam used to fill a tooth cavity

    Correct Answer
    A. Oil and vinegar salad dressing
    Explanation
    Oil and vinegar salad dressing is not a homogeneous mixture because it is a suspension of oil droplets in vinegar. Homogeneous mixtures have uniform composition and properties throughout, whereas in the case of salad dressing, the oil and vinegar do not fully mix and separate over time. On the other hand, sugar dissolved in water, oxygen and nitrogen gases in the air, and a silver mercury amalgam used to fill a tooth cavity are all examples of homogeneous mixtures as they have uniform composition and properties.

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  • 20. 
    Give me one example of an element, a compound, a homogeneous mixture, and a heterogeneous mixture. - ProProfs

    Give me one example of an element, a compound, a homogeneous mixture, and a heterogeneous mixture.

Quiz Review Timeline (Updated): Feb 22, 2024 +

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  • Current Version
  • Feb 22, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 13, 2013
    Quiz Created by
    Robmid28
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