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(17) ___________________ a quality or condition of a substance that can be observed or measured.
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(10) A group of students had a graduated cylinder with 22.0 mL water in it and each student recorded the volume of the water. Their measurements were: 19.0 mL, 18.9 mL, and 28.1 mL. The group’s measurements were –
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(15) This number has 7 significant figures.
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(20) ___________________ a change during which some properties of a material change but not the composition.
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(3) Use the diagram to the right to answer this question. Why is the funnel with filter paper used in this filtering procedure?
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(2) When working in the laboratory, which one of the following actions does NOT represent safe and correct chemical handling?
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(4) An experiment requires the use of a lab apron, goggles, and insulated mitts or beaker tongs. The purpose of these safety items is primarily to protect against —
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
(21f) A balloon filled with helium gas gets larger as it is heated.
accurate but not precise.
hot materials and spills of harmful liquids
physical change
physical property
to separate solid particles from the liquid particles
physical change
9.872000
Pouring chemical waste down the drain
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