NGSS.HS-PS1-7

Is this equation balanced?

• yes
• no
• Not enough information

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NGSS.HS-PS1-7

The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting

• Percent
• actual
• stoichiometry
• theoretical

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NGSS.HS-PS1-7

24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride

• 62 
• 38
• 24
• 14

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NGSS.HS-PS1-7

Write a balanced equation for this DR reaction.

NaOH + Fe(NO₃)₃ -->

• NaFe + OH(NO₃)₃

• 2NaNO₃ + 3Fe(OH)₃

• NaNO₃ + FeOH

• 3NaNO₃ + Fe(OH)₃

Tags

NGSS.HS-PS1-7

Balance this equation.

_CF₄ + _Br₂ --> _CBr₄ + _F₂

• 2,1,2,1

• 1,2,2,1

• 1,2,1,2

• 2,2,2,2

Tags

NGSS.HS-PS1-7

The two (2) is indicating _________.

• subscripts

• reactants

• coefficients

• aqueous

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NGSS.HS-PS1-7

Write values of a,b and c if following chemical reaction is balanced .

aMg + bO2 → cMgO

• (i) a=2, b=1, c=2

• (ii) a=1, b=1, c=2

• (iii) a=2, b=1, c=1

• (iv) a=2, b=2, c=2

Tags

NGSS.HS-PS1-7

73 grams of AlBr₃ (267 g/mol) is how many moles?

• .273 moles

• 263 moles

• 4.23 moles

Tags

NGSS.HS-PS1-7

What is the Law of Conservation of mass?

• Mass is created in a chemical reaction
• Mass is created in a physical change
• New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
• Mass is never created or destroyed

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NGSS.HS-PS1-7

Which of the following equations are correctly balanced?

• 12CO₂ + H₂O ---> C₆H₁₂O₆ + O₂

• CO₂ + H₂O ---> 3C₆H₁₂O₆ + O₂

• CO₂ + 9H₂O ---> C₆H₁₂O₆ + O₂

• 6CO₂ + 6H₂O ---> C₆H₁₂O₆ + 6O₂

Tags

NGSS.HS-PS1-7