8.6 B Check #1

How many elements are in the compound Na(OH)

• 2
• 4
• 5
• 3

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TEKS.SCI.8.6B

• 1

• 2

• 3

• 4

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TEKS.SCI.8.6B

How many Sulfur (S) are in the compound 2PS₂O₄

• 3
• 2
• 4
• 5

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TEKS.SCI.8.6B

• 1

• 2

• 3

• 4

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TEKS.SCI.8.6B

How many atoms of each element are in 2P(SO₂)₃

• P: 3, S: 4, O: 8

• P: 2, S: 3, O: 6

• P: 2, S: 6, O: 12

• P: 1, S: 5, O: 10

Answer explanation

In 2P(SO2)3, there are 2 phosphorus (P), 3 sulfur (S) per molecule, and 2 oxygen (O) per sulfur. Thus, for 3 molecules: P = 2, S = 3*3 = 9, O = 2*3*3 = 12. The correct count is P: 2, S: 6, O: 12.

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TEKS.SCI.8.6B

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TEKS.SCI.8.6B

How many atoms of each element are in 3NaOH

• 3 sodium, 3 oxygen, 3 hydrogen
• 1 sodium, 3 oxygen, 3 hydrogen
• 3 sodium, 1 oxygen, 2 hydrogen
• 2 sodium, 1 oxygen, 1 hydrogen

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TEKS.SCI.8.6B

How many atoms of each element are present in Na(S₂O₂)₄

• Na: 1, S: 8, O: 8

• Na: 3, S: 8, O: 5
• Na: 1, S: 6, O: 10
• Na: 2, S: 4, O: 6

Tags

TEKS.SCI.8.6B

Which equation has MORE oxygen atoms?

• 2Na + 2H2O -> 2NaOH + H2

• HCl + NaOH -> NaCl + H2O

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TEKS.SCI.8.6B

• 1

• 2

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TEKS.SCI.8.6B