At constant pressure, what temperature must be reached to increase the volume of a 100-milliliter sample of a gas, initially at 300 K, to 200 milliliters?

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.

is the answers your welcome! : )