Copper reacts with silver nitrate through single replacement.
If 2.60 g of silver is produced from the reaction, how many moles of copper(II) nitrate are also produced?

Approximately .

Explanation:

reacts with to produce and .

.

To balance this equation, start by setting the coefficient of the most complex species to . For example, has more atoms in each of its formula unit than any other species in this reaction. Let the coefficient of

.

That formula unit of would include:

The other product, , contains neither atoms nor atoms. Therefore, the product side would include exactly

Atoms are conserved in a chemical reaction. The reactant side shall also include:

Among the reactants, is the only source of atoms. Each formula unit of

Similarly, the coefficient of would be .

.

There would be exactly atom on the reactant side (from .) The products should also include

Hence the equation:

.

The ratio between the coefficients of and is:

.

Rearrange this equation to obtain:

.

In other words, (the number of moles of that is produced) can be found from (the number of moles of that is produced.)

On the other hand, can be found from (the mass of that is produced) using (the formula mass of .)

Look up relative atomic mass data of on a modern periodic table:

Therefore, the relative atomic mass of would be:

.

Calculate :

.

Calculate :

.

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