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Chemistry Chapt 1-2
Question | Answer |
---|---|
The study of the processes that take place in organisms | Biochemistry |
Concerned with the mechanism, rate, and energy transfer that occurs when matter undergoes a change | Physical Chemistry |
The study of all chemicals CONTAINING carbon | Organic Chemistry |
The study of all chemicals that, in general, DO NOT CONTAIN carbon | Inorganic Chemistry |
The study of the composition of matter | Analytical Chemistry |
Gaseous state of substance that is a liquid or solid at room temperature | Vapor |
A physical blend of two or more components | Mixture |
Part of a sample having uniform composition and properties | Phase |
Not uniform in composition | Heterogeneous |
A substance formed in a chemical reactoin | Product |
Starting substance in a chemical reaction | Reactant |
Amount of matter an object contains | Mass |
Describes mixture with a uniform composition | Homogeneous |
A process in which a liquid is boiled to produce a vapor that is condensed again into a liquid | Distillation |
Substance that cannot be changed into simpler substances by chemical means | Element |
Composed of two or more substances chemically combined in a fixed proportion | Compound |
Process in which substances are changed into different substances | Chemical Reaction |
Which field of science studies the composition and structure of matter? | A leaf changing color in autumn |
What describes Pure chemistry | Study of chemicals CONTAINING carbon |
What is NOT an example of chemistry research in the main area of Energy? | Producing Hook-and-Loop tape |
What is a example of a current research focus in chemsitry | Applying gene therapy to treat certain diseases |
What can be observed only in a microscopic view? | structure of a muscle cell |
One characteristic of a scientific Theory is that: | It can never be proved |
Which step in the scientific method requires you to use your senses to obtain information? | Making an observation |
What step should you always follow for an effective problem solving? | Developing a plan and then implementing the plan |
How do conceptual problems differ from numeric problems? | Solutions to conceptual problems normally do not involve calculations |
What is not an example of matter? | Heat |
A Golf ball has more mass than a tennis ball because it | Contains more matter |
An example of an extensive property of matter is: | Mass |
Rusting is a propertie of which one Chemical or physical? | Chemical |
What are considered physical properties of a substance? | Color and Odor, melting and boiling points, malleability and hardness |
Vapor is what kind matter? | Gas |
A substance that forms a vapor is generally in what physical state at room temperature? | Liquid and Solid |
Which state of matter has a definite volume and takes the shape of its container? | Liquid |
Which state of matter takes both the shape and volume of its container? | Gas |
Which state of matter is Characterized by having an indefinite shape, but a definite volume? | Liquid |
Which state of matter is characterized by having a definite shape and a definite volume | Solid |
Which state of matter expands when heated and is easy to compress? | Gas |
What is NOT a physical propertie of a substance in a liquid state? | Indefinite Volume |
What is a physical Change? | Evaporation |
What can not be classified as a substance | Air |
What can not be considered a single phase? | A Heterogeneous Mixture |
What is true about homogeneous mixtures? | They are known as solutions |
What is a Heterogeneous mixture? | Oil and vinegar |
What is a Homogeneous Mixture? | Salt and water |
Whats an example of a Homogeneous Mixture? | Stainless steel |
What is true about homogeneous mixtures? | They are known as solutions |
What is a Heterogeneous mixture? | Oil and vinegar |
What is a Homogeneous Mixture? | Salt and water |
Whats an example of a Homogeneous Mixture? | Stainless steel |
What distinguishes a substance from a mixture? | Mixtures can be separated physically, while compounds cannot |
What is true about compounds? | They are substances |
What is materials is a substance? | Silver |
What is the difference between a mixture and a compound | a compound can only be separated into its components by chemical means |
What do chemicals symbols and formulas represent, respectively? | Elements and Compounds |
What distinguishes a substance from a mixture? | Mixtures can be separated physically, while compounds cannot |
What is a chemical propertie? | Ability to react with oxygen |
What represents a compound? Example: | H2O |
What must occur for a change to be a chemical reaction? | There must be a change in chemical properties |
The chemical formula of a compound does NOT indicated ____? What? | How elements are joined in the compound |
What do chemicals symbols and formulas represent, respectively? | Elements and Compounds |
What is a chemical propertie? | Ability to react with oxygen |
What is not a physical Change? | Fermenting of cheese |
What must occur for a change to be a chemical reaction? | There must be a change in chemical properties |
What is not a physical Change? | Fermenting of cheese |
What is not involved in a physical change? | Deomposing |
What must be done to be certain that a chemical Change has taken place? | Check the composition of the sample before and after the change |
What indicates that a chemical change may have taken place | Fracture formation |
What happens to matter during a chemical reaction | Matter is neither destroyed or created |
What is true about all Chemical Reactions | The total mass of the reactants equals the total mass of the products |