Daily Problems Second Six Weeks

1
Daily ProblemsSecond Six Weeks

• 3 October through
• 10 November 2004

2
3 October 2004

• Fill in new Table of Contents and start new Daily
  Problems

3
4 October 2004

• Which volume units are used in graduated
  cylinders?
• The volume units used in graduated cylinders are
  milliliters (mL).

4
5 October 2004

• How is the mass of water in a graduated cylinder
  determined?
• The mass of water in a graduated cylinder is
  determined by subtracting the mass of the
  cylinder from the mass of the cylinder plus the
  water.

5
6 October 2004

• What is the formula for density?
• The formula for density is
• density mass/volume
• or
• d m/v

6
7 October 2004

• A liquid has a mass of 15.7 g and a volume of
  20.0 mL. Find its density.
• d m/v
• d 15.7 g/ 20.0 mL
• d 0.785 g/mL

7
10 October 2004

• Find the density of a wood block that is 2.5 cm
  thick, 4.0 cm wide, 10.0 cm long and has a mass
  of 95.0 g.
• V LWT
• (10.0 cm)(4.0 cm)(2.5 cm)
• 100 cm3
• d m/v 95.0 g/100 cm3
• 0.95 g/cm3

8
11 October 2004

• Find the density of an object that is 3.7 cm
  thick, 5.6 cm wide, 12.4 cm long and has a mass
  of 124 g.
• V LWT
• (12.4 cm)(5.6 cm)(3.7 cm)
• 257 cm3
• d m/v 124 g/257 cm3
• 0.48 g/cm3

9
12 October 2004

• A sheet of metal foil is 0.0010 cm thick, 10.2 cm
  wide, 17.8 cm long and has a mass of 1.62 g. Find
  its density.
• V LWT
• (17.8 cm)(10.2 cm)(0.0010 cm)
• 0.182 cm3
• d m/v 1.62 g/0.182 cm3
• 8.9 g/cm3

10
13 October 2004

• One hundred small nails have a mass of 285 g.
  When placed in a graduated cylinder the water
  level rises from 100.0 mL to 136.5 mL. Find
  density.
• V 136.5 mL 100.0 mL 36.5 mL
• d m/v 285 g/36.5 mL
• 7.81 g/mL

11
14 October 2004

• Twelve large nails have a mass of 119.7 g. When
  placed in a graduated cylinder, the water level
  rises from 61.5 mL to 76.8 mL. Find density.
• V 76.8 mL 61.5 mL 15.3 mL
• d m/v 119.7 g/15.3 mL
• 7.82 g/mL

12
17 October 2004

• A cylindrical solid is 11.3 cm long and has a
  diameter of 2.7 cm. Its mass is 61.8 g. Find
  density.
• V ?r2L 64.7 cm3
• d m/v 61.8 g/64.7 cm3
• 0.955 g/cm3

13
18 October 2004

• Find density when the mass is 193.0 g and the
  volume is 10.0 cm3. Identify the substance.
• d m/v 193.0 g/ 10.0 cm3
• 19.3 g/ cm3
• substance is gold

14
19 October 2004

• Find density when the mass is 89.0 g and the
  volume is 10.0 cm3. Identify the substance.
• d m/v 89.0 g/ 10.0 cm3
• 8.9 g/ cm3
• substance is copper

15
20 October 2004

• Draw a picture of a graduated cylinder containing
  corn syrup, density 1.3 g/mL, and water,
  density 1.0 g/mL. Rubbing alcohol with a
  density of 0.80 g/mL is added. Where will the new
  layer be?
• top-alcohol
• middle-water
• bottom-corn syrup

16
21 October 2004

• An object has a volume of 5.0 cm3 and a density
  of 2.6 g/cm3. Find its mass.
• d m/v
• m dv (2.6g/cm3)(5.0 cm3)
• 13 g

17
24 October 2004

• List the three phases of matter.
• The three phases of matter are solid, liquid, and
  gas.

18
25 October 2004

• Which phase of matter was produced in yesterdays
  lab?
• Gas (carbon dioxide) was produced when baking
  soda and vinegar reacted.

19
26 October

• What three particles make up an atom?
• The three particles that make up atoms are
  protons, neutrons, and electrons.

20
27 October 2004

• What is the name of the negatively charged
  particles in atoms.
• Negatively charged particles in atoms are
  electrons.

21
28 October 2004

• What is the name of the positively charged
  particles in atoms.
• Positively charged particles in atoms are protons.

22
1 November 2004

• Name the neutral particles found in atoms.
• The neutral particles found in atoms are neutrons.

23
2 November 2004

• Where are protons located in atoms?
• Protons are located in the nucleus of an atom.

24
3 Novemeber 2004

• Where are neutrons located in atoms?
• Neutrons are located in the nucleus of an atom.

25
4 November 2004

• Where are electrons found in atoms?
• Electrons in an atom are found flying around the
  nucleus.

26
7 November 2004

• Draw a model of a helium atom.

27
8 November 2004

• Changing which particle in an atom will result in
  a new element?
• Changing the number of protons in an atom results
  in a new element.

28
9 November 2004

• How many groups are on a periodic table?
• There are seven groups on a periodic table.

29
10 November 2004

• How many periods are on a periodic table?
• There are 18 periods on a periodic table.