Question

calculate the formula mass for dinitrogen pentoxide.
express your answer in atomic mass units to two decimal places.
formula mass =

part e
give the correct formula for copper(i) sulfate.
express your answer as a chemical formula.

part f
calculate the formula mass for copper(i) sulfate.
express your answer in atomic mass units to two decimal places.
formula mass =

Explanation:

Part D

Step1: Determine the formula of dinitrogen pentoxide

The formula of dinitrogen pentoxide is \(N_2O_5\).

Step2: Find the atomic masses

The atomic mass of \(N\) (nitrogen) is \(14.01\space amu\), and the atomic mass of \(O\) (oxygen) is \(16.00\space amu\).

Step3: Calculate the formula mass

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Part E

Step1: Determine the ions

Copper(I) ion is \(Cu^+\), and sulfate ion is \(SO_4^{2 -}\).

Step2: Balance the charges

To balance the charges, we need 2 \(Cu^+\) ions for each \(SO_4^{2 -}\) ion.
So the formula is \(Cu_2SO_4\).

Part F

Step1: Determine the formula of copper(I) sulfate

The formula is \(Cu_2SO_4\).

Step2: Find the atomic masses

The atomic mass of \(Cu\) (copper) is \(63.55\space amu\), the atomic mass of \(S\) (sulfur) is \(32.07\space amu\), and the atomic mass of \(O\) (oxygen) is \(16.00\space amu\).

Step3: Calculate the formula mass

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Answer:

• Part D: \(108.02\space amu\)
• Part E: \(Cu_2SO_4\)
• Part F: \(223.17\space amu\)