Question

Can someone help me with this it's due in tomorrow and I don't know what to do

Answer 1

1) CO₂ :-

Breaking down the masses :-

• C = 12u
• O = 16u

What's the sum :-

Mass of C + 2(Mass of O)

⇒ 12u + 2×16u

Relative Formula Mass :-

12u + 2×16u

⇒ 12u + 32u

⇒ 44u

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2) CH₄ :-

Breaking down the masses :-

• C = 12u
• H = 1u

What's the sum :-

Mass of C + 4(Mass of H)

⇒ 12u + 4×1u

Relative Formula Mass :-

12u + 4×1u

⇒ 12u + 4u

⇒ 16u

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3) NH₃ :-

Breaking down the masses :-

• N = 14u
• H = 1u

What's the sum :-

Mass of N + 3(Mass of H)

⇒ 14u + 3×1u

Relative Formula Mass :-

14u + 3×1u

⇒ 14u + 3u

⇒ 17u

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4) SO₂ :-

Breaking down the masses :-

• S = 32u
• O = 16u

What's the sum :-

Mass of S + 2(Mass of O)

⇒ 32u + 2×16u

Relative Formula Mass :-

32u + 2×16u

⇒ 32u + 32u

⇒ 64u

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5) CaCO₃ :-

Breaking down the masses :-

• Ca = 40u
• C = 12u
• O = 16u

What's the sum :-

Mass of Ca + Mass of C + 3(Mass of O)

⇒ 40u + 12u + 3×16u

Relative Formula Mass :-

40u + 12u + 3×16u

⇒ 40u + 12u + 48u

⇒ 100u

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6) H₂O :-

Breaking down the masses :-

• H = 1u
• O = 16u

What's the sum :-

2(Mass of H) + Mass of O

⇒ 2×1u + 16u

Relative Formula Mass :-

2×1u + 16u

⇒ 2u + 16u

⇒ 18u

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7) NaCl :-

Breaking down the masses :-

• Na = 23u
• Cl = 35.5u

What's the sum :-

Mass of Na + Mass of Cl

⇒ 23u + 35.5u

Relative Formula Mass :-

23u + 35.5u

⇒ 58.5u

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8) C₂H₆ :-

Breaking down the masses :-

• C = 12u
• H = 1u

What's the sum :-

2(Mass of C) + 6(Mass of H)

⇒ 2×12u + 6×1u

Relative Formula Mass :-

2×12u + 6×1u

⇒ 24u + 6u

⇒ 30u

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9) LiOH :-

Breaking down the masses :-

• Li = 6u
• O = 16u
• H = 1u

What's the sum :-

Mass of Li + Mass of O + Mass of H

⇒ 6u + 16u + 1u

Relative Formula Mass :-

6u + 16u + 1u

⇒ 23u

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10) H₂SO₄ :-

Breaking down the masses :-

• H = 1u
• S = 32u
• O = 16u

What's the sum :-

2(Mass of H) + Mass of S + 4(Mass of O)

⇒ 2×1u + 32u + 4×16u

Relative Formula Mass :-

2×1u + 32u + 4×16u

⇒ 2u + 32u + 64u

⇒ 98u