Podcast
Questions and Answers
What is the difference between a pure substance and a mixture?
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?
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?
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?
What units are associated with gases in the density equation?
Which group on the periodic table contains the alkali metals?
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 key feature of dimensional analysis when performing unit conversions?
What is the relationship between atomic mass and isotopes?
What is the relationship between atomic mass and isotopes?
Which factor influences the atomic size trend on the periodic table?
Which factor influences the atomic size trend on the periodic table?
How does metallic character change across a period in 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?
What principle does the octet rule follow in chemical bonding?
Which element property does electronegativity measure?
Which element property does electronegativity measure?
When determining bond polarity, what does a nonpolar bond exhibit?
When determining bond polarity, what does a nonpolar bond exhibit?
