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Chemical Equations weekly Test

Authored by Consuelo Cano

Science

8th Grade

NGSS covered

Used 13+ times

Chemical Equations weekly Test
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Iron and Oxygen gas react to form Iron Oxide, or rust. Which statement about the substances in this reaction is correct?

4Fe + 3O2 → 2Fe2O3

The mass of the Iron equals the mass of the Iron Oxide

The mass of the Iron plus the mass of the Oxygen gas equal the mass of the Iron Oxide.

The mass of the Iron Oxide is less than the total mass of the Iron and the Oxygen gas

The mass of the Iron Oxide is more than the total mass of the Iron and the Oxygen gas

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

2.

FILL IN THE BLANK QUESTION

1 min • 1 pt

2Na + Cl2 → 2 NaCl

55g + 7g → ?

What is the mass of the Products in this chemical reaction?

Tags

NGSS.MS-PS1-5

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What does each circle or sphere in the diagram represent?

An atom

A compound

A mixture

A molecule

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A balanced chemical equation showing how Methane (CH4) and Oxygen (O2) combine to form Carbon Dioxide (CO2) and water (H2O) is shown

CH4 + 2O2 → CO2 + 2H2O

Which statement about the substances involved in this reaction is correct?

The total mass of the CO2 and H2O is less than the total mass of the methane and O2

Methane, Oxygen, and Carbon Dioxide do not have mass because they are gases

The total mass of the methane and O2 is less than the total mass of the CO2 and H2O

A. The total mass of the methane and O2 equal the total mass of the CO2 and H2O

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The equation below shows how Lithium and water react to produce Lithium hydroxide (LiOH), a strong base.

2Li + 2H2O → 2LiOH + H2

What are the Products of this reaction?

2Li and H2

2Li and 2H2O

2LiOH and H2

2H2O and 2LiOH

Tags

NGSS.MS-PS1-2

6.

FILL IN THE BLANK QUESTION

1 min • 1 pt

A chemical reaction is shown

2Al2O3 → 4Al + 3O2

? → 108g + 96g

What is the mass of the Reactants in this chemical reaction?

Tags

NGSS.MS-PS1-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In which of these compounds are there twice as many Oxygen atoms as Hydrogen atoms?

H2SO4

H2O

H3PO4

HClO3

Tags

NGSS.MS-PS1-1

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