Matter - Properties & Changes

Which of the following is a vapor?

• helium

• hydrogen

• oxygen

• steam

A characteristic that can be observed or measured without changing the sample's composition is ________________.

• a chemical property

• a physical property

• a gaseous property

• a crystalline property

A(n) ____________ is a transition from one state of matter to another.

• chemical change

• phase change

• extensive property

• intensive property

In the chemical reaction shown below, what is the beginning mass of mercuric oxide?

2HgO (? Grams) → 2Hg (200 grams) + O₂ (16 grams)

• 184 grams

• 200 grams

• 16 grams

• 216 grams

A heterogeneous mixture is poured through a piece of filter paper that is positioned over a beaker. What is the substance that is collected in the beaker?

• heterogeneous mixture

• solid

• solution

• Not enough information is given.

________ is a separation technique that produces highly pure solids.

• crystallization

• sublimation

• chromatography

• filtration

A solution of solids is a(n)___________.

• filtration

• alloy

• pure metal

• heterogeneous mixture

Which of the following is a compound?

• water

• neon

• steel

• crude oil

Periods are ___________ on the periodic table.

• horizontal rows

• vertical columns

• left to right diagonals

• right to left diagonals

In table 3.5, why are the mass ratios of copper to chlorine not the same for compound I and compound II?

• experimental error

• the two compounds are not the same

• there is another element not shown

• the copper changes to chlorine in compound II