Question #c8c79
1 Answer
Explanation:
The first thing you need to determine is how many atoms you get per molecule of hydrogen sulfide,
![http://nutritionnistes.org:83/Dossiers%20exces%20h2S%20dans%20le%20biogaz_DE.htm]()
You know by looking at the subscripts in the chemical formula that one molecule of hydrogen sulfide contains
- two atoms of hydrogen
- one atom of sulfur
So one molecule contains a total of three atoms.
Next, find you how many molecules of hydrogen sulfide you get in that many moles. You know that one mole of a substance contains exactly
In your case, you will have
0.8color(red)(cancel(color(black)("moles H"_2"S"))) * (6.022 * 10^(23)"molecules")/(1color(red)(cancel(color(black)("mole H"_2"S")))) = 4.818 * 10^(23)"molecules"
This means that the number of atoms will be
4.818 * 10^(23)color(red)(cancel(color(black)("molecules H"_2"S"))) * "3 atoms"/(1color(red)(cancel(color(black)("molecule H"_2"S")))) = 15.45 * 10^(23)"atoms"
I'll leave the answer rounded to two sig figs, despite the fact that you only gave one sig fig for the number of moles of hydrogen sulfide
"no. of atoms" = color(green)(15 * 10^(23))