Answer:
O4Br9
Explanation:
Tetra means 4 and nona means 9. Just use these prefixes to decide how many of each element you have.
Electrons basically ARE the chemical bond. The atoms are joined together by the bonds.
Assuming that the ammonium sulfide formula is (NH4)2S then you can see that there are 2 nitrogen, 8 hydrogen and 2 sulfur atoms for every ammonium sulfide. If the amount of ammonium sulfide is 8.9 moles, then the number of hydrogen atoms should be: 8/1 * 8.9 mol= 71.2 moles
