a,\(\overline{M}_{Cl}=\dfrac{35.75,77+37.\left(100-75,77\right)}{100}=35,4846\left(u\right)\)
b,\(\overline{M}_C=\dfrac{12.98,9+13.\left(100-98,9\right)}{100}=12,011\left(u\right)\)
c,\(\overline{M}_{Li}=\dfrac{6.7,5+7.\left(100-7,5\right)}{100}=6,925\left(u\right)\)
d, \(\overline{M}_{Cu}=\dfrac{63.69,15+65.\left(100-69,15\right)}{100}=63,617\left(u\right)\)
e, \(\overline{M}_K=\dfrac{39.93,26+40.0,01+41.\left(100-93,26-0,01\right)}{100}=39,1347\left(u\right)\)
f,\(\overline{M}_{Ar}=\dfrac{36.0,34+38.0,06+40.\left(100-0,34-0,06\right)}{100}=39,9852\left(u\right)\)
g, \(\overline{M}_{Ni}=\dfrac{58.68,27+60.26,1+61.1,13+62.\left(100-68,27-26,1-1,13\right)}{100}=58,7359\left(u\right)\)
