How many moles of ammonia will contain 1.55 x 1021 atoms of hydrogen?
Thanks for any help
there are three hydrogen atoms in each ammonia molecule
(1.55E21 / 3) is the number of ammonia molecules needed
the number of moles is ... (1.55E21 / 3) / 6.02E23
1.55E21 atoms H is how many moles? That's
1.55E21 atoms x (1 mol /6.02E23 atoms = estd 0.25E-2 or about 0.0025.
But 1 mol NH3 has three mols H atoms; therefore,
0.0025 mols H x (1 mol NH3/3 mols H) = ?
To find the number of moles of ammonia containing a given number of hydrogen atoms, you need to use Avogadro's constant and the molar ratio in the chemical formula of ammonia (NH3).
The molar ratio of hydrogen to ammonia is 3:1, meaning there are three hydrogen atoms for every one ammonia molecule. So, if you know the number of hydrogen atoms, you can determine the number of ammonia molecules.
Step 1: Calculate the number of ammonia molecules
Divide the given number of hydrogen atoms by 3 (since there are three hydrogen atoms in each ammonia molecule).
1.55 x 10^21 atoms of hydrogen / 3 = 5.17 x 10^20 ammonia molecules
Step 2: Convert to moles
To convert the number of ammonia molecules to moles, divide by Avogadro's constant. Avogadro's constant is approximately 6.022 x 10^23 mol^-1.
5.17 x 10^20 ammonia molecules / 6.022 x 10^23 mol^-1 = 0.008587 moles of ammonia
Therefore, 1.55 x 10^21 atoms of hydrogen would contain approximately 0.008587 moles of ammonia.