What is the % nitrogen by weight in 6.389 mol of ammonium sulfide? answer in units of %.

42.36 %

What's the formula of ammonium sulfide?

Consider the two ions:

The charge on each sulfide ion is twice that on each ammonium ion. You shall expect two ammonium ions for each sulfide ion:

What's the mass of nitrogen in one mole formula unit of ammonium sulfide?

There are two moles of ammonium ions in one mole formula unit of . There's one nitrogen atom in each ammonium ion. Therefore, there are two moles of nitrogen atoms in each mole formula unit of .

Relative atomic mass from a modern periodic table:

The mass of that two moles of nitrogen atoms will be .

What's the %mass of nitrogen in ?

is an ionic compound. The composition of this compound shall be uniform throughout its ionic lattice. As a result, the percentage mass of nitrogen in 6.289 moles formula units of shall be the same as that in one mole formula units of . (However, finding the value in the case with one mole of the substance is likely easier.)

Now, what's the mass of one mole formula units of ?

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What the percentage mass of nitrogen in ammonium sulfide?

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it forms an anion that has a larger radius. anions have a negative charge and are larger than the original atom.