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2023 Test Cons. of Mass and Physical and Chem Change

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Last updated about 3 years ago
20 questions
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Question 1
1.

The arrow (yield sign) in a chemical equation represent what?

Question 2
2.

The compounds to the left of the arrow are called the...

Question 3
3.

The compounds to the right of the arrow are called the...

Question 4
4.

How many hydrogen atoms are in the reactant above?

Question 5
5.

How many oxygen atoms are in the reactant above?

Question 6
6.

How many oxygen atoms are in the product above?

Question 7
7.

How many hydrogen atoms are in the product above?

Question 8
8.

Is the chemical equation balanced or unbalanced?

Question 9
9.

In the picture above, the coefficent is represented what number?

Question 10
10.

In the picture above, the subscript is represented by the number...

Question 11
11.

The Law of Conservation of Matter states that:

Question 12
12.

Before a chemical reaction, the total mass of two reactants is measured to be 40 grams. After the reaction, what should be the total mass of the products?

Question 13
13.

What happens to the atoms in a chemical reaction?

Question 14
14.

Copper chloride and aluminum react to produce aluminum chloride and copper. Which of the following is the correctly balanced chemical equation for this reaction? (Hint: It's the only balanced equation)

Question 15
15.

Hydrogen and oxygen react to produce water. Which of the following is the correctly balanced chemical equation for this reaction?

Question 16
16.

Water heating and turning into steam is a ___________ change.

Question 17
17.

Iron rusting is a ___________ change.

Question 18
18.

Select all of the pictures that represent a chemical change.

Question 19
19.

Select all examples of chemical changes.

Question 20
20.

What are the 5 evidences of a chemical change? (CHOOSE FIVE)