How many atoms are contained in the chemical formula #2AgNO_3#?

1 Answer
Dec 19, 2015

Answer:

In one silver nitrate formula unit, there are 3 oxygen ATOMS, 1 nitrogen ATOM, and 1 silver atom.

Explanation:

Quite clearly, in 2 formula units of silver nitrate, there are 2 silver atoms, 2 nitrogen atoms, and 6 oxygen atoms.

We can improve this answer by using the mole concept. The mole is simply a VERY large number: #N_A= 6.022xx10^23#.

If we have 2 moles of silver nitrate, there are #N_A# silver atoms, #2xxN_A# nitrogen atoms, and #6xxN_A# oxygen atoms. Using the molar masses of each element, we can therefore predict the MASS of a mole of silver nitrate as #169.87# #g*mol^-1#, where this mass is the sum of the individual molar masses of the constituent elements.