Which atom in the pictured molecule will have the strongest partial positive charge?
In the given molecule of NH2CHRCO2H the ball and stick model gives an idea about the bonds arranged in this molecule. With the given information it is easy to identify that Carbon and Oxygen atoms in the double bond CO will have the strongest partial positive charges.
As the bond is that is first oxygen is attached to carbon by a double bond and another oxygen is attached by a single bond. So, when carbon is attached to oxygen which is more electronegative pulls the electron cloud towards itself and gives carbon a partial positive charge.