Which of these is NOT a way to tell that a chemical reaction is happening?
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Question 2
2.
Fill in the blanks to correctly complete the statements below:
The chemicals at the beginning of a chemical reaction that react together are called the _______ . The chemicals that are produced at the end of the reaction are called the _______ .
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Question 3
3.
What makes a reaction exothermic?
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Question 4
4.
What is the big number that you are allowed to change in a chemical equation called?
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Question 5
5.
Balance the following chemical equation.
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Question 6
6.
Balance the following chemical equation.
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Question 7
7.
Which of these is NOT a ‘Base’ metric unit?
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Question 8
8.
Compared to the base unit, what does the prefix ‘kilo-‘ represent?
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Question 9
9.
One one-thousandth (1/1000 or 0.001) base units is represented by which prefix?
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Question 10
10.
Show your work to convert the following measurement.
218 g = __________________ kg
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Question 11
11.
Show your work to convert the following measurement.
75 mL = __________________ L
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Question 12
12.
Show your work to convert the following measurement.
7.77 km = _________________ m
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Question 13
13.
Show your work to convert the following measurement.
2.77 m = __________________ cm
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Question 14
14.
Which of the following best describes density?
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Question 15
15.
What is the formula for density?
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Question 16
16.
Liquid oxygen has a volume of 14mL and a mass of 7g. What is the density of liquid oxygen?
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Question 17
17.
The first law of motion states that an object at rest or in motion will remain at rest or in motion...
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Question 18
18.
Fill in the blanks to correctly complete the equation that represents the second law of motion.
F = _______ x _______
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Question 19
19.
The third law of motion states that for every force exerted on an object, there will be an equal and opposite force. Describe what this means in your own words and provide two examples to help explain your point.
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Question 20
20.
What is the main difference between speed and velocity?
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Question 21
21.
How can you distinguish between an ionic and covalent bond?
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Question 22
22.
What are valence electrons?
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Question 23
23.
Which state of matter takes the shape of its container and has NO definite volume?
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Question 24
24.
Which term describes changing from gas to liquid?
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Question 25
25.
What is a physical property?
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Question 26
26.
Fill in the blanks to correctly complete the statements below.
A _______ change is when you change how a substance looks but it is still the same substance, while in a _______ change you change one set of substances into something completely different.
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Question 27
27.
What type of charge does an electron have?
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Question 28
28.
How many protons does Boron have?
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Question 29
29.
Show your work to calculate how many neutrons Calcium has.
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Question 30
30.
How many electrons can fit on the 3rd shell of an atom?