AP Chemistry: Introduction to Key Concepts - Lesson 1.1 Quiz

What is dimensional analysis and how is it used in AP Chemistry?

• A method used to convert between units of measurement

• A technique for balancing chemical equations

• A way to determine the number of significant figures in a measurement

• A process for calculating the molar mass of a substance

What are significant figures and why are they important in AP Chemistry?

• The digits in a measurement that are known with certainty

• The number of decimal places in a measurement

• The precision of a measuring instrument

• The accuracy of a measurement

How do you round off answers properly in AP Chemistry?

• Round to the nearest whole number

• Round to the same number of decimal places as the least precise measurement

• Round to the same number of significant figures as the least precise measurement

• Round to the nearest tenth

What are S.I. prefixes and how are they used in AP Chemistry?

• Symbols used to represent elements on the periodic table

• Units used to measure temperature

• Prefixes used to indicate multiples or submultiples of base units

• Abbreviations used to represent chemical compounds

What is the purpose of designing experiments and procedures to test a prediction or theory in AP Chemistry?

• To prove that the prediction or theory is correct

• To collect data that can be used to support or refute the prediction or theory

• To demonstrate mastery of laboratory techniques

• To earn credit towards the AP Chemistry exam

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How do you create graphs, diagrams, and models that represent chemical phenomena in AP Chemistry?

• By using computer software to generate visual representations of data

• By drawing freehand sketches based on observations and data

• By using mathematical equations to generate graphs and diagrams

• All of the above methods can be used to create graphs, diagrams, and models that represent chemical phenomena in AP Chemistry.

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How does the microscopic structure of a substance determine its chemical properties in AP Chemistry?

• The arrangement of atoms within a molecule determines its shape and reactivity.

• The type of bonding within a substance determines its melting point and boiling point.

• The strength of intermolecular forces between molecules determines their physical state at room temperature.

• All of the above factors contribute to determining the chemical properties of a substance.

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How do you balance a chemical equation in AP Chemistry?

• By ensuring that the same number of atoms of each element are present on both sides of the equation.

• By adding coefficients to balance the charges on both sides of the equation.

• By adding or removing reactants or products until the equation is balanced.

• By changing the subscripts in chemical formulas until the equation is balanced.

What is a scientific claim and how do you support it with evidence in AP Chemistry?

• A scientific claim is an assertion about how something works or why something happens, supported by evidence from observations, experiments, or data analysis.

• A scientific claim is an opinion about how something works or why something happens, supported by personal experience or anecdotal evidence.

• A scientific claim is an assumption about how something works or why something happens, supported by logical reasoning or common sense.

• A scientific claim is an educated guess about how something works or why something happens, supported by intuition or gut feeling.

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How do you visually represent relationships across different levels and scales, and between structures and interactions in AP Chemistry?

• By using graphs, diagrams, and models to show connections between macroscopic observations and microscopic explanations.

• By using mathematical equations to describe relationships between variables at different scales.

• By using analogies and metaphors to help explain complex concepts at different levels of understanding.

• All of the above methods can be used to visually represent relationships across different levels and scales, and between structures and interactions in AP Chemistry.

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