Question

How many moles of nitrogen atoms are there in 6 moles of tnt?

Answer 1

Answer: 18 moles of nitrogen atoms

Explanation:

TNT is trinitrotoluene with molecular formula of $C_7H_5N_3O_6$

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP, weighs equal to the molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

From the molecular formula , it can be seen that :

1 mole of $C_7H_5N_3O_6$ contains 3 moles of nitrogen atoms.

Thus 6 moles of $C_7H_5N_3O_6$ contains =$\frac{3}{1}\times 6=18$ moles of nitrogen atoms.

Thus 18 moles of nitrogen atoms are there in 6 moles of TNT.

Answer 2

To determine the number of nitrogen atoms, we need to know first the chemical formula of TNT. From literature, it has a chemical formula of C7H5N3O6. Then, we relate the atoms of N with the said chemical formula. To convert from moles of N to atoms of N, we use Avogadro's number. It represents the number of units in one mole of any substance. This has the value of 6.022 x 10^23 units / mole. We do as follows:

6 moles C7H5N3O6 ( 3 mol N / 1 mol C7H5N3O6 ) ( 6.022x10^23 atoms N / 1 mol N ) = 1.08 x 10^25 atoms N

Therefore, there are 1.08 x 10^25 atoms of nitrogen for 6 moles of TNT.