Potpourri
This state of matter has particles that are locked in place and are vibrating
Solid
This subatomic particle is determines what element the atom is
Protons
This phase change occurs after ice cream gains thermal energy and turns into a liquid
melting
What is the formula for solving the volume of a regular object?
L x W x H
A metal block has a volume of 5 cm3 and a density of 8 g/cm3. What is the mass of the metal block?
M = 40 g
M = D(V)
M = 5 cm3 (8 g/cm3)
M = 40 g
True or False: Sublimation occurs when a Solid turns into a gas.
True
Electrons
This phase change occurs when the temperature of water in a pot begins to boil, and steam rises
Evaporation
What is the formula for solving the volume of an irregular object?
A substance has a mass of 120 g and a density of 3 g/cm3. What is the volume of the substance?
V = 40 cm3
V = M / D
V = 120 g / 3 g/cm3
V = 40 cm3
This state of matter has particles that are colliding frequently, moving freely and independently
Gas
This subatomic particle lives in the nucleus, has no charge, and helps stabilize that atom
Neutrons
This phase change occurs when the temperature cools and clouds begin forming in the sky
Condensation
A jewelry box has a length of 9 cm, width of 9 cm, and height of 3 cm. What is its volume?
243 cm3
A rock has a mass of 150 grams and a density of 5 g/mL. What is the volume of the rock?
V = 30 mL
V = M / D
V = 150 g / 5 g/mL
V = 30 mL
The bright lustrous round pearl has a mass of 5 grams. The pearl is placed into a graduated cylinder filled with 20 mL of water and the meniscus rose to 22.25 mL.
Does the the pearl float in water?
No, D = 2.22 g/mL > 1 g/mL
V = Ending Volume - Starting Volume
V = 22 mL - 20 mL
V = 2.25 mL
D = M/V
D = 5 g / 2.25 mL
D - 2.22 g/mL
This atom has 13 protons, 14 neutrons, and 12 electrons. What is the net charge?
+1
(13 +protons and 12 -electrons)
This phase change occurs when the temperature is so cold, frost begins to form on the surface of a car's windshield without any liquid water
Deposition
A graduated cylinder starts with a volume of 50 mL of water. A key is placed into the graduated cylinder with water and the volume rises to 53.4 mL. What is the volume of the key?
3.4 mL
A brick fits into a hole that is 500 cm3 and its density is 9 g/cm3. What is the mass of the brick in Kg?
M = D(V)
M = 9 g/cm3 (500 cm3)
M = 4500 g
M = 4500 g / 1000
M = 4.5 Kg
The box has a dimensions of 30 cm x 30 cm x 30 cm. It has a density of .75 g/cm3. What is its mass in Kg?
M = 20.25 Kg
V = 30 cm x 30 cm x 30 cm
V = 27,000 cm3
M = D(V)
M = .75 g/cm3 (27,000 cm3)
M = 20,250 g
M = 20,250 g / 1000
M = 20.25 Kg
This atom has 11 protons, 9 neutrons, and 11 electrons. Is this an Ion or a neutral atom and is it stable or unstable?
neutral atom and unstable
When hot air is blown into a hot-air-balloon, it begins to rise in the atmosphere.
Explain how density, temperature, and air particle movement explains this phenomena.
When the hot air inside the balloon is hotter than the air outside, the particles begin to move faster which increases the volume of the balloon, making it less dense than the air around it. Things that are less dense (balloon) float above things that are more dense (air around balloon).
A shoebox has a length of 35 cm, width of 23.5 cm, and a height of 13.5 cm. What is its volume?
11,103.75 cm3
A piece of wood has the volume of 2.5 L and a density of 0.8 g/mL. What is the mass of the piece of wood?
2000 g
2.5 L = 2.5 x 1000 = 2500 mL
M = D(v)
M = 2500 mL (0.8 g/mL)
M = 2000 g