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Reactions Test 50

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Last updated about 6 years ago
33 questions
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Question 1
1.

Each substance to the right of the arrow in a chemical equation is a

Question 2
2.

The numbers that go before symbols and formulas in a chemical equation are

Question 3
3.

Substances that speed up chemical reactions are called

Question 4
4.

A blank chemical equation has the same number of atoms of each element on each side of the equation.

Question 5
5.

If something is burned, a blank reaction has occurred.

Question 6
6.

Why does an increase in temperature result in an increase in reaction rate?

Question 7
7.

If energy must be ADDED to a chemical reaction for the reaction to take place, the reaction is blank.

Question 8
8.

In a chemical equation, this symbol means dissolved in water

Question 9
9.

What type of reaction needs oxygen and produces carbon dioxide and water vapor?

Question 10
10.

NaOH and HCL produces NaCl + H20 is a double displacement reaction.

Question 11
11.

A teacher wants to demonstrate a chemical reaction for her students. Which activity would best demonstrate a chemical reaction?

Question 12
12.

When a wood fire burns, it releases heat into the environment. This type of reaction is blank.

Question 13
13.

The law of conservation of Mass states

Question 14
14.

Which of the following observation does NOT indicate that a chemical reaction has occurred?

Question 15
15.

Which situation provides the best evidence that a chemical reaction is taking place?

Question 16
16.

A substance that is an ingredient in a chemical reaction is called a blank.

Question 17
17.

Hydrogen reacts with oxygen to produce water; which substances are the reactants?

Question 18
18.

The S symbol written after a formula in a chemical equation stands for blank?

Question 19
19.

A solid produced from two liquids in a double displacment chemical reaction is called a blank.

Question 20
20.

To balance a chemcial equation, it may be neccessary to adjust the

Question 21
21.

Balance the equation

Question 22
22.

What type of reaction is number twenty one?

Question 23
23.

Balance the equation

Question 24
24.

What type of reaction is number twenty three?

Question 25
25.

Balance the equation

Question 26
26.

What type of reaction is number twenty five?

Question 27
27.

Balance the equation

Question 28
28.

What type of reaction is number twenty seven?

Question 29
29.

Balance the equation

Question 30
30.

What type of reaction is number twenty nine?

Question 31
31.

The more concentrated a solution is, the slower the reaction rate

Question 32
32.

an Endothermic reaction absorbs energy

Question 33
33.

An exothermic reaction releases energy