Any molecular formula will tell you how many atoms are in it.
I don't want to just give you the answer so let's use another atom...C6H12O6. Your basic monosaccharide. It has...
6 carbon atoms
12 hydrogen
6 oxygen
Add 'em up and you get 24 atoms.
An atom that doesn't have a number behind it has only one example of it in each molecule...CH4 has one carbon and four hydrogens.
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There are a total of 15 atoms in NH4Br: 1 nitrogen atom, 4 hydrogen atoms, and 1 bromine atom in the molecule.
Ammonium bromide. It is ionic and contains the polyatomic ammonium ion, NH4+ and the bromide ion Br-
Ammonium bromide - NH4Br - contain 6 atoms.
The chemical formula for ammonium perbromate is NH4BrO4.
Sodium has a charge of +1 and bromine has a charge of -1. The net charge on the molecule has to be zero, so one of each ion is required. The formula is NaBr, one atom of sodium and one atom of bromine.
The balanced equation for ammonium hydroxide added to hydrobromic acid is: NH4OH + HBr -> NH4Br + H2O
There are 20 atoms and there are 6 Carbon atoms, 8 Hydrogen atoms, 6 Oxygen atoms.