Mass and Change

QuizÂ by Kristy Roberts

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17 questions
• Q1
Mass is...
the amount of particles in an object
the amount of space an object takes up
how closely packed together the particles are
all of the answers are true
30s
• Q2
What is a precipitate?
A 0.1M solution
An insoluble substance that can form when two substances are mixed together
A soluble substance that can form when two substances are mixed together
Condensation that forms on a beaker
30s
• Q3
Does gas have mass?
Sometimes
Only when it is warm
Yes
No
30s
• Q4
In a perfect world, where no errors can occur, what should have happened with the mass of burning steel wool lab?
The mass should have stayed the same
The mass should have decreased
The mass should have increased
30s
• Q5
When an object loses mass it is really losing ____________.
precipitate
volume
particles
size
30s
• Q6
In a perfect world, where no errors can occur, what should have happened with the mass of dissolved Alka-Seltzer lab?
The mass should have increased
The mass should have stayed the same
The mass should have decreased
30s
• Q7
If you burned a piece of copper metal over a Bunsen burner what should happen with the mass of the copper metal and why?
The mass should stay the same because nothing will happen to the copper, it will just get hot
The mass should increase because you are adding gas particles
The mass should decrease because you are melting the copper
The mass should decrease because you are burning the copper
30s
• Q8
Which of the following labs should have the same results? (assume no errors occurred)
Burning Steel Wool, Ice & Water, Dissolved Alka-Seltzer
Steel Wool, Ice & Water, Precipitate, Dissolved Alka-Seltzer
Dissolved Sugar and Dissolved Alka-Seltzer
Steel Wool, Ice & Water, Precipitate, Dissolved Sugar
30s
• Q9
The Law of Conservation of Mass states that...
Mass can disappear and reappear at any given time
Mass cannot be created or destroyed
Solids and Liquids have mass but gas does not
Mass can be created but not destroyed
30s
• Q10
Two clear liquids were mixed in a beaker at 5C. The resulting mixture remained homogeneous. After a few seconds, bubbles began to form and float to the surface of the beaker. After several minutes, the entire solution equilateral to room temperature . After several hours, the volume of the solution decreased by several milliliters. Which indicates that a chemical change occurred?
The solution reached room temperature
The liquids remained homogeneous after being mixed
The volume of the solution decreased over time
The solution released gas bubbles
30s
• Q11
Which of the following is NOT a physical property of helium?
It is nontoxic
It almost always exists as a gas
It has extremely low reactivity
It will not form diatomic molecules
30s
• Q12
Which of the following is a physical property of rubbing alcohol?
It releases heat during combustion
It is a clear liquid
It is mildly acidic
It is flammable
30s
• Q13
In a perfect world, where no errors can occur, what should have happened with the mass of steel wool lab?
The mass should have increased
The mass should have stayed the same
The mass should have decreased
30s
• Q14
In a perfect world, where no errors can occur, what should have happened with the mass of ice and water lab?
The mass should have decreased
The mass should have increased
The mass should have stayed the same
30s
• Q15
In a perfect world, where no errors can occur, what should have happened with the mass of precipitate lab?
The mass should have stayed the same
The mass should have decreased
The mass should have increased
30s

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