Show:
Describing Matter
Classifying Matter
Measuring Matter
Smell my Gas!
Misc
100

Anything that has mass and occupies space is called __________.

Matter

100

Matter that has a definite and uniform composition is called a __________.

Pure substance

100

Which laboratory instrument would be most appropriate for measuring 25.0 mL of water accurately?

A. Balance
B. Graduated cylinder
C. Meter stick
D. Thermometer

B — Graduated cylinder

100

According to Boyle's Law, when temperature remains constant, what happens to the volume of a gas when pressure increases?

Pressure and volume have an inverse relationship.

100

A sample has:

Mass = 60.0 g

Density = 3.00 g/mL

Determine its volume.

V = m/D

V = 60.0/3.00

V = 20.0 mL

200

A student observes that a sample of copper is reddish-brown, shiny, and solid at room temperature.

Are these observations physical properties or chemical properties?

Physical properties

200

Classify each substance as an element, compound, homogeneous mixture, or heterogeneous mixture.

A. Oxygen gas: __________________________
B. Salt water: __________________________
C. Carbon dioxide: ______________________
D. Salad: ______________________________

A. Element
B. Homogeneous mixture
C. Compound
D. Heterogeneous mixture

200

Use a balance to determine the mass of a St Agnes Planner

Measured Mass: __________________ g

about 320.5 grams

200

A gas occupies 4.0 L at 1.5 atm. The gas is compressed until its pressure reaches 3.0 atm.

Calculate the new volume.

(1.5 atm)(4.0 L) = (3.0 atm)(V₂)

6.0 = 3.0V₂

V₂ = 2.0 L

200

An unknown metal has:

Mass = 53.4 g

Volume = 6.00 cm³

Calculate the density 

Density: __________________ g/cm³


D = 53.4/6.00

D = 8.90 g/cm³


300

A metal sample has the following characteristics:

  • Mass = 54.0 g
  • Volume = 20.0 mL
  • Color = silver
  • Melting point = 660°C

Identify two quantitative properties and one qualitative property.

Quantitative examples: mass of 54.0 g; volume of 20.0 mL; melting point of 660°C


Qualitative: silver color

300

A beaker contains water with salt completely dissolved in it.

  1. Is this a pure substance or mixture?
  2. Is it homogeneous or heterogeneous?


  1. Mixture
  2. Homogeneous mixture
300

A rectangular metal block measures:

  • Length = 5.0 cm
  • Width = 3.0 cm
  • Height = 2.0 cm

Calculate its volume

V = l × w × h

V = 5.0 × 3.0 × 2.0

V = 30 cm³

300

A balloon has a volume of 2.50 L at 300 K. It is heated to 360 K while pressure remains constant.

Calculate the new volume.

2.50/300 = V₂/360

V₂ = 3.00 L

Answer: 3.00 L

300

A student places a capped syringe containing air under increasing pressure.

The student records:

Pressure & Volume

Questions

  1. Which gas law is demonstrated?
  1. What relationship exists between pressure and volume?


  • Boyle's Law
  • Pressure and volume are inversely proportional.
400

A student burns a strip of magnesium and observes that a bright white light is produced and a new white solid forms.

Is this primarily a physical change or a chemical change? Explain your reasoning.

Chemical change because a new substance forms during the reaction.

400

A student is given four unknown samples.

  • Sample A contains only one type of atom.
  • Sample B contains two types of atoms chemically bonded in a fixed ratio.
  • Sample C contains substances evenly distributed throughout.
  • Sample D contains visibly different regions.

Classify each sample.

A: ____________________________________
B: ____________________________________
C: ____________________________________
D: ____________________________________

A. Element
B. Compound
C. Homogeneous mixture
D. Heterogeneous mixture

400

A metal sample has a mass of 78.0 g and a volume of 10.0 cm³.

Calculate its density.

D = m/V

D = 78.0/10.0

D = 7.80 g/cm³

400

A gas occupies 3.50 L at 1.20 atm and 300 K.

The pressure changes to 0.90 atm and the temperature increases to 350 K.

(1.20)(3.50)/300 = (0.90)(V₂)/350

V₂ ≈ 5.44 L

400

The state of matter where the particles move around and take on the SHAPE of their container, but don't always fill it

Liquid

500

A substance has the following properties:

  • Density = 7.87 g/cm³
  • Melting point = 1538°C
  • Reacts with oxygen
  • Conducts electricity
  • Can be hammered into thin sheets

Classify each property as physical or chemical.

Density — Physical
Melting point — Physical
Reacts with oxygen — Chemical
Conductivity — Physical
Malleability — Physical

500

A student receives a mixture containing iron filings, sand, and salt.

Describe a logical procedure for separating all three substances.

Use a magnet to remove the iron. Add water to dissolve the salt. Filter the mixture to separate the sand from the salt solution. Evaporate the water to recover the salt.

500

An irregular object is placed into a graduated cylinder.

Initial water volume = 42.0 mL

Final water volume = 58.5 mL

Mass of object = 131.2 g


A. Calculate the volume of the object.

B. Calculate its density.

Volume = 58.5 − 42.0

Volume = 16.5 cm³

Density = 131.2 ÷ 16.5

Density ≈ 7.95 g/cm³

500

A weather balloon contains 9.50 L of gas at a temperature of 19°C. The balloon is heated by sunlight until the gas temperature reaches 35°C, while the external pressure remains constant. The flexible balloon is able to expand freely as the gas warms. Calculate the new volume of the balloon.

2929.50=308V2

Solve:

V2=(9.50)(308)292V2=10.02L

Final Answer: 10 L

500

The temperature inside a greenhouse reaches 104°F during a warm afternoon. What is this temperature in degrees Celsius?

57.8 C or 58 C