Exam 1 Review: Scientific Method, Metric System, Conversions

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What is the difference between a pure substance and a mixture?

Pure substances can be separated into their components while mixtures cannot

Pure substances are always liquids while mixtures can be solids, liquids, or gases

Pure substances have uniform composition while mixtures have variable composition (correct)

Pure substances contain only one type of atom while mixtures contain multiple types of atoms

Which scale measures temperature using the freezing and boiling points of water?

Rankine scale

Celsius scale (correct)

Fahrenheit scale

Kelvin scale

What is the definition of a calorie?

The amount of energy needed to cool 1 gram of water by 1 degree Celsius

The amount of energy needed to raise the temperature of 1 gram of water by 1 degree Celsius (correct)

The amount of energy needed to raise the temperature of 1 kilogram of water by 1 degree Fahrenheit

The amount of energy needed to freeze 1 kilogram of water

What units are associated with gases in the density equation?

g/L Signup and view all the answers

Which group on the periodic table contains the alkali metals?

Group 1 Signup and view all the answers

What is the key feature of dimensional analysis when performing unit conversions?

Maintaining the correct units through each step of the conversion Signup and view all the answers

What is the relationship between atomic mass and isotopes?

Atomic mass is the average weight of all the isotopes of an element. Signup and view all the answers

Which factor influences the atomic size trend on the periodic table?

Valence electrons Signup and view all the answers

How does metallic character change across a period in the periodic table?

Decreases Signup and view all the answers

What principle does the octet rule follow in chemical bonding?

Stable configuration with 8 valence electrons Signup and view all the answers

Which element property does electronegativity measure?

Tendency to attract electrons in a chemical bond Signup and view all the answers

When determining bond polarity, what does a nonpolar bond exhibit?

Equal sharing of electrons Signup and view all the answers

Exam 1 Review: Scientific Method, Metric System, Conversions

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Questions and Answers

What is the difference between a pure substance and a mixture?

Which scale measures temperature using the freezing and boiling points of water?

What is the definition of a calorie?

What units are associated with gases in the density equation?

Which group on the periodic table contains the alkali metals?

What is the key feature of dimensional analysis when performing unit conversions?

What is the relationship between atomic mass and isotopes?

Which factor influences the atomic size trend on the periodic table?

How does metallic character change across a period in the periodic table?

What principle does the octet rule follow in chemical bonding?

Which element property does electronegativity measure?

When determining bond polarity, what does a nonpolar bond exhibit?

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