When exactly 238.72 g of Mg reacts with excess silver nitrate, how many moles of Ag are produced? Mg + 2 AgNO3 Mg(NO3)2 + 2 Ag

Please help :) ASAP

Ok where is the image ?

The answer is c - the principal of original lateral continuity. 

Each calcium ion has a charge of +2, which can also be written as ca2+. if those ions move out of the neuron and no other ions are moving, the neuron would lose the positive charge associated with those ions and become more negatively charged.