Consider the following balanced equation: cu + 2agno3 cu(no3)2 + 2ag how many moles of agno3 would be needed to produce 2.8 moles of cu(no3)2?

5.6 moles of AgNO3 is required to produce 2.8 moles of Cu(NO3)2

Explanation:

Cu + 2AgNO3 Cu(NO3)2 + 2Ag

Before solving this one must make sure the equation is balanced.  From the balance equation you could notice that the AgNo3(silver nitrate) has 2 moles while the Cu(NO3)2 has 1 mole.

If 2 moles = 1 mole

    ?   = 2.8 moles

cross multiply 2.8 x 2 = 5.6 moles    

i think it is true since you can test the answer and can use observations to complete it.