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Q 1/10
Score 0
Melted steel is allowed to become solid. What happens to the kinetic energy and particle arrangement?
30
The kinetic energy decreases and the distance between the particles decreases.
The kinetic energy decreases and the distance between the particles increases.
The kinetic energy increases and the distance between the particles increases.
The kinetic energy increases and the distance between the particles decreases.
Q 2/10
Score 0
Lemon juice and baking soda mixes. What will the final weight of this reaction in a closed plastic bag?
30
Less than the starting weight because some atoms were destroyed.
Same as the starting weight because atoms do not change during the experiment.
Same as the starting weight because some atoms got destroyed.
Greater than the starting weight because new atoms are created.
10 questions
Q.
Melted steel is allowed to become solid. What happens to the kinetic energy and particle arrangement?
1
30 sec
Q.
Lemon juice and baking soda mixes. What will the final weight of this reaction in a closed plastic bag?
2
30 sec
Q.
You place an empty, sealed water bottle in the fridge. Later on, you notice the bottle is "dented." Why would this be?
3
30 sec
Q.
What is the difference between the particles of a solid and a liquid?
4
30 sec
Q.
How is a gas different than solids and iquids?
5
30 sec
Q.
The chemical formula for two water molecules is 2H2O (little 2 in the middle). What kinds & how many atoms are there?
6
30 sec
Q.
Which of the following have the same number of atoms?
7
30 sec
Q.
Two balloons are filled with helium gas, each with the same amount of helium atoms. If Balloon 1 has more thermal energy, which balloon's atoms will be moving faster on average?
8
30 sec
Q.
Liquid water takes the shape of whatever container it is poured into, but solid ice does not. On a molecular level, why is tis true?
9
30 sec
Q.
A thermometer is placed in a cup of hot water. Why does the level of liquid in the thermometer rise?
