Chem Meaning Reviewer

• What is atomic mass sometimes called?

  Atomic weight
• What unit is atomic mass measured in?

  Atomic mass units (amu)
• What is an atomic mass unit equal to?

  One-twelfth the mass of carbon-12
• What is another name for one atomic mass unit?

  One Dalton
• What does average atomic mass represent?

  The weighted average of isotopes of an element
• What is mass defect?

  The difference between actual and predicted mass
• What is always true about actual mass compared to particle mass?

  Actual mass is less than particle mass
• What is nuclear binding energy?

  Energy required to split an atomic molecule
• What does nuclear binding energy equal?

  The energy equivalent to mass defect
• What is a mole (mol)?

  Amount of substance with 6.022 x 10²³ entities
• What does molar mass represent?

  Mass of 1 mole of a substance
• What are the units for molar mass?

  g/mol or kg/mol
• What is molecular mass also known as?

  Molecular weight
• What does formula mass represent?

  Sum of atomic masses in an ionic compound
• What is percent composition by mass?

  Percent by mass of each element in a compound
• What is a test tube used for?

  Holding small samples or reactions
• What are beakers primarily used for?

  Holding liquid and solid samples
• What should be noted about volume markings on beakers?

  They are rough estimates, not accurate
• What is the purpose of an Erlenmeyer flask?

  Used as a reaction vessel in titrations
• What is a volumetric flask used for?

  Measuring and storing solutions accurately
• How is a volumetric flask marked?

  Has a marking near the top for volume
• What is a graduated pipette used for?

  Transferring small quantities of liquid
• What distinguishes a Mohr pipette?

  Graduation ends before the tip
• What is a serological pipette?

  Graduation continues to the tip
• What is a volumetric pipette used for?

  Delivering a specific volume of liquid
• What is a disposable pipette made of?

  Plastic
• What is a burette used for?

  Measuring volume in chemical analysis
• What does a clamp do in a laboratory?

  Holds round laboratory glassware
• What is the function of a funnel?

  Guides liquid or powder into small openings
• What is a test tube brush used for?

  Cleaning test tubes and narrow glassware
• What is the purpose of a test tube holder?

  Holds test tubes when hot
• What is a test tube rock used for?

  Holding and organizing test tubes
• What are tongs used for?

  Gripping and lifting objects
• What is a tripod for a Bunsen burner used for?

  Supporting flasks and beakers
• What is a wash bottle used for?

  Rinsing laboratory glassware
• What is a spatula used for?

  Scraping and transferring powders
• What is filter paper used for?

  Separating fine substances from liquids
• What is a watch glass used for?

  Evaporating liquids and holding solids
• What is a mortar and pestle used for?

  Crushing and grinding substances
• What is a reagent bottle used for?

  Containing chemicals in liquid or powder form