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Knowledge Check- Intro to Reactions

Authored by Michael Stratton

Chemistry

9th - 12th Grade

Knowledge Check- Intro to Reactions
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53 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

When balancing equations a ____ can be placed to the left of a formula of a substance to make the equations balanced

charge
subscript
random number
coefficient

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

The substances at the beginning of a chemical reaction are called the ____

product
yield
chemical symbol
reactants

3.

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

What is the part of the chemical equation in green called? 
Fe + S --> FeS

products
reactants
yield
chemical formula

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many atoms of aluminum are on each side of the following equation: 4Al + 3O--> 2AlO3

2
6
1
4

5.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the Law of Conservation of Mass?

It states that no matter can be created or destroyed.

It states that no energy can be created or destroyed.

It states that matter can be created or destroyed.

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is a coefficient?

The small number on the right of the chemical symbol.

The large number in front of a chemical formula.

The number in between the chemical symbols.

7.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

What is the little number after an element in a chemical equation called.

Example: H2

Coefficient

Subscript

Atom

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