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Chapter 3: 3.112_CP (page 136)

The study of sulfur-nitrogen compounds is an active area of chemical research, made more so by the discovery in the early 1980s of one such compound that conducts electricity like a metal. The first sulfur-nitrogen compound was prepared in 1835 and serves today as a reactant for preparing many of the others. Mass spectrometry of the compound shows a molar mass of 184.27 g/mol, and analysis shows it to contain 2.288 g of S for every 1.000 g of N. What is its molecular formula?

Short Answer

Expert verified

The molecular formula is S4N4.

Step by step solution

01

Finding the moles of S and N

On converting the mass of S & N into moles by multiplication for molar mass reciprocal.

Moles of S=2.288 g S×1 molS32.07 g S=0.0713 mol SMoles of N=1 g N×1 mol N14.01 g N=0.0714 molN

02

Finding the molecular formula

The whole number multiple can be derived as,

=184.27 g/mol46.08 g/molWhole number multiple=4

On multiplying the subscript of S1N1 by 4. The molecular formula can be found as S4N4.

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