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Compounds can be separated into elements by ______.

• chemical changes

• physical changes

• paper chromatography

_______ separates mixtures based on differences in particle size.

• filtering

• distillation

• chromatography

_______ separates mixtures based on differences in boiling point.

• filtering

• distillation

• chromatography

_______ separates mixtures based on differences in polarity.

• filtering

• distillation

• chromatography

Which type of change conserves masss?

• chemical

• physical

• both

• neither

Rank the following from least precise to most precise.

• burette

• beaker

• graduated cylinder

• volumetric flask

density =

• mass * volume

• mass / volume

• volume / mass

The simplest whole # ratio of the atoms in a compound is called the

• molecular formula

• empirical formula

• density

• percent yield

Percent yield =

• experimental / theoretical

• theoretical / experimental

• theoretical * experimental

Percent error =

• (experimental - theoretical) / theoretical

• (experimental + theoretical) / theoretical

• (experimental - theoretical) * theoretical

• (experimental * theoretical) / theoretical