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galben [10]
3 years ago
7

How many moles of Ag can be produced if 350. g of Cu are reacted with excess AgNO3 according to the equation Cu(s) + 2AgNO3(aq)

® 2Ag(s) + Cu(NO3)2(aq)?
Chemistry
2 answers:
Lubov Fominskaja [6]3 years ago
7 0

<u>Answer:</u> The moles of Ag produced will be 11.02 moles.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

For copper:

Given mass of copper = 350 g

Molar mass of copper = 63.5 g/mol

Putting values in above equation, we get:

\text{Moles of copper}=\frac{350g}{63.5g/mol}=5.51mol

For the given chemical equation:

Cu(s)+2AgNO_3(aq.)\rightarrow 2Ag(s)+Cu(NO_3)_2(aq.)

Silver nitrate is present in excess, so it is considered as an excess reagent and copper is considered as a limiting reagent because it limits the formation of products.

By Stoichiometry of the reaction:

1 mole of copper produces 2 moles of silver.

So, 5.51 moles of copper will produce = \frac{2}{1}\times 5.51=11.02mol of silver.

Thus, the moles of Ag produced will be 11.02 moles.

Ksju [112]3 years ago
3 0
Hello.

balance the equation first 
<span>Cu + 2AgNO3 ----> [2Ag] + Cu(NO3)2 
</span>

<span>Now set up the equation </span>
<span>350gCu*(1molCu/ 63.546g Cu) * (2molAg/1molCu) * (107.8682g Ag/1molAg)
 </span>

<span>Cancel out 1molCu with 1molCu, and cancel out 2molAg with 1molAg (it still remains 2mol Ag) </span>

<span>You are left with </span>
<span>350gCu*(1/63.546g Cu)*(2Ag/1)* (107.8682g Ag/1) 
</span>

<span>350gCu*1*2*107.8682= 75507.74g 
</span>

<span>now divide 75507.74g by 63.546g 
</span>
<span>you get [1188.2374972460896g Ag]
</span>
Have a nice day
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