The mass of nickel is 36.5g metal.
Ni+2AgNO3 → Ni(NO3)2+2Ag
21.5g Ni / 58.69g = 0.366mol Ni
Ag = 107.87
N i= 58.69
But, 2molAg per 1 mol Ni, so, change in mass is more like...
Twice as many moles Ag as Ni, and then the mass relationship is 107.87g Ag / 58.69, but due to the 2Ag: 1Ni mol ratio, the change in mass is like:
107.87(2) / 58.69 = 3.68 times increase
So, the final mass of Ag is 3.68x, and the change in mass of Ni is x
36.5=(21.5-x)+(3.68x)
Solve for x
x=5.597
3.68x=g Ag
3.68(5.597)=20.59
21.5 - x = g Ni after reaction
21.5 - 5.597 = 15.903g Ni
20.59g Ag + 15.903g Ni = 36.5g metal
The mass of nickel is 36.5g metal.
Learn more about reactions here: brainly.com/question/16416932
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