NGSS.MS-PS1-5

Balance this equation
_N₂ + _H₂ --> _NH₃

• 1,2,3
• 1,3,2
• 1,1,2
• 2,1,1

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NGSS.MS-PS1-5

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

• 4g
• 5g
• 9g
• 14g

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NGSS.MS-PS1-5

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• No!

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NGSS.MS-PS1-5

In a chemical reaction burning natural gas starts with 8 atoms of hydrogen (H), how many atoms of hydrogen should be the product?

• 1 atoms of hydrogen (H)

• 4 atoms of hydrogen (H)

• 2 atoms of hydrogen (H)

• 8 atoms of hydrogen (H)

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NGSS.MS-PS1-5

Which is the Law of Conservation of Matter?

• matter cannot be created or destroyed, it only rearranges

• matter can be created but it cannot be destroyed, it never rearranges

• matter can be destroyed but it cannot be created, it usually just rearranges

• matter is an unproven theory created by Hans Geiger

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NGSS.MS-PS1-5

True or False. You must convert grams to moles to do stoichiometry.

• True
• False

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NGSS.MS-PS1-5

Which chemical equation matches the model shown?

• 3C + 4O --> 3CO2

• 3C + 2O2 --> 3CO2

• C3 + 4O --> 3CO6

• C3 + 2O2 --> 3CO6

Tags

NGSS.MS-PS1-5

Is this balanced?

Yes No

Al₂ + O₃→ Al₂O₃

• Yes

• No

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NGSS.MS-PS1-5

To balance an equation you should:

• ONLY change subscripts.

• ONLY change coefficients.

• Change BOTH subscripts and coefficients.

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NGSS.MS-PS1-5

Which statement is true about a chemical reaction?

• The physical states of the atoms in the reactants determine the products.

• Some of the atoms in the reactants will be a part of the products.

• The number of atoms in the reactants determines the products.

• All of the atoms in the reactants will be a part of the products.

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NGSS.MS-PS1-5