Chapter 2: Q128CP (page 86)

Give the molecular mass of each compound depicted below, and provide a correct name for any that are named incorrectly.

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The molecular mass for the compounds can be given below,

Step by step solution

The correct name of the compound depicted is boron trifluoride as it contains three fluorine atoms.

The molecular mass can be denoted as,

$Molecular mass = Atomic mass of B + 3 \times Atomic mass of F = 10.8 + 3 \times 19 = 67.8 amu$

Mon can be ignored so the correct name is Sulfur dichloride.

The molecular mass can be denoted as,

$Molecular mass = Atomic mass of S + 2 \times Atomic mass of Cl = 32.07 + 2 \times 35.45 = 102.97 amu$

The given name is correct and the molecular mass can be denoted as,

$Molecular mass = Atomic mass of P + 3 \times Atomic mass of Cl = 30.97 + 3 \times 35.45 = 137.32 amu$

Nitrogen is not present as anion nitride so the correct name is dinitrogen pentoxide.

The molecular mass can be denoted as,

$Molecular mass = 2 \times Atomic mass of N + 5 \times Atomic mass of Cl = 2 \times 14.01 + 5 \times 16 = 108.02 amu$

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