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Chemical formulas and more...

Authored by Janesa Moore

Science

8th Grade

NGSS covered

Used 9+ times

Chemical formulas and more...
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20 questions

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1.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

H3SO4
HSO4
H4S3O
H2O

Tags

NGSS.MS-PS1-1

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?

2Mg and O2

2MgO

Mg and MgO

O and MgO

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

2H2O + 2N → 4H + 2NO

The chemical symbols on the RIGHT (at the end of the equation) are called:

products

reactants

yields/produces

4.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Which of the following chemical equations follows the Law of Conservation of Mass? Hint: which is balanced?

CO2 + H2O --> C6H12O6 + O2

C6O + H12O --> C6H12O2

CO2 + H2O --> C6H12O6 + O2

CO2 +H2O --> C6H12O6 +O2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

5.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Media Image

Which of the following pictures is an example of a chemical change?

Wood burning in a fireplace

ice melting in water in a beaker

a cracked rock

boiling water on a hotplate

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

6.

MULTIPLE CHOICE QUESTION

5 mins • 1 pt

Media Image

For an investigation a student poured a blue solution of CuSO4 into a beaker. The student placed a shiny, silver-colored strip of zinc metal in the solution and wrote down the changes. Which change shows that a CHEMICAL REACTION took place?

A dark solid (precipitate) formed on the zinc metal.

The zinc metal stayed silver-colored and shiny

The CuSO4 solution evaporated after the zinc metal was added.

None of these

Tags

NGSS.MS-PS1-2

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How is a physical change different from a chemical change?

There is absolutely no difference
Chemical changes produce a new substance, physical changes stay the same substance
Chemical changes create and destroy matter, physical changes don't
Physical changes create and destroy matter, chemical changes dont

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