Chemical Equations weekly Test
Authored by Consuelo Cano
Science
8th Grade
NGSS covered
Used 13+ times
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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
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
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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