REVIEW: Unit 8

​ (a)   H₂ + ​ (b)   Cl₂ → ​ (c)   HCl

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Tags

NGSS.HS-PS1-4

What is the right part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical Equation

In a balanced equation, the total number of atoms of each element on the left side (reactants) is _____ the total number of atoms on the right side (products).

• equal to

• greater than

• less than

• unequal to

Tags

NGSS.HS-PS1-7

The Law of Conservation of Mass states that mass is ______ during a chemical reaction.

• created

• destroyed

• converted into energy

• neither created nor destroyed

Tags

NGSS.HS-PS1-7

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

​ (a)   Al + ​ (b)   O₂ → ​ (c)   Al₂O₃

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​ (a)   Fe + ​ (b)   O₂ → ​ (c)   Fe₂O₃

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What is the left part of a chemical equation called?

2H₂ + O₂ ---> 2H₂O

• Reactants

• Yields

• Products

• Chemical equation

​ ​ (a)   NaHCO₃ → ​ ​ (b)   Na₂CO₃ + ​ ​ (c)   H₂O + ​ (d)   CO₂

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​ (a)   ZnS + ​ (b)   O₂ → ​ (c)   ZnO + ​ (d)   SO₂

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