Balancing Chemical Equations Flashcards by curt bixel

Q

How many carbon atoms are represented below?

A

1

(There is one carbon atom in one molecule of methane. The carbon atom is the black atom in the center)

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Q

How many oxygen atoms are represented below?

A

4

(Count the 4 red atoms in the two oxygen molecules)

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Q

How many carbon atoms are represented below?

A

1

(Its the black one in the middle)

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Q

How many water molecules are represented below?

A

2 water molecules

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Q

How many atoms, total, are represented below?

A

9

(count ‘em)

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Q

How would you represent the molecule below in a chemical equation?

A

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Q

How would you represent what is below in a chemical equation?

A

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Q

Look at the chemical equation below. How many molecules of methane (CH₄) are shown?

CH₄ + 2O₂ → CO₂ + 2H₂O

A

1

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Q

How would you represent what is below in a chemical equation?

A

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Q

How would you represent what is below in a chemical equation?

A

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Q

How would you represent what is below in a chemical equation?

A

CO₂ + 2H₂O

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Q

How would you represent what is below in a chemical equation?

A

CH₄ + 20₂

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Q

What is the chemical formula for this compound?

A

Fe₂O₃

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Q

What is the chemical formula for this?

A

3Fe₂O₃

(3 molecules of Iron Oxide)

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Q

What is the chemical formula for this?

A

4Na

(Four individual atoms of Sodium)

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Q

What is the chemical formula for this?

A

ZnCl₂

(One molecule of zinc chloride)

Q

What is the chemical formula for this?

A

4ZnCl_{<span>2</span>}

(Four molecules of zinc chloride)

Q

What is the chemical formula for this?

A

NaCl

Q

What is the chemical formula for this?

A

3NaCl

Q

What is the chemical formula for this?

A

Cl₂

(One molecule of chlorine)

Q

What is the chemical formula for this?

A

5Cl₂

(5 molecules of chlorine)

Q

What is the chemical formula for this?

A

Zn(OH)₂

(One molecule of zinc hydroxide)

Q

What is the chemical formula for this?

A

3Zn(OH)_{<span>2</span>}

(3 molecules of zinc hydroxide)

Q

What is the chemical formula for this?

A

CaBr₂

(one molecule of calcium bromide)

Q

What is the chemical formula for this?

A

3CaBr₂

(3 molecules of calcium bromide)

Q

What is the chemical formula for this?

A

H_{<span>2</span>}0

(One molecule of water)

Q

What is the chemical formula for this?

A

6H₂0

(6 molecules of water)

Q

You will see this little guy often. What is he?

A

Hydroxide

(Oxygen and Hydrogen pair up like this so often, we sometimes just treat them like a single object.)

Q

What is the chemical formula for this?

A

3OH

(If these three hydroxide groups were part of a larger molecule, perhaps stuck onto an aluminum atom, you might see them represented as follows:

Al(OH)₃

Q

What is the chemical formula for this?

A

Al(OH)₃

(one molecule of aluminum hydroxide)

Q

What is the chemical formula for this?

A

2Al(OH)₃

(2 molecules of aluminum hydroxide)