If 832 joules of energy are required to raise the temperature of a sample of aluminum from 20.0 °C to 97.0 °C, and the specific heat of aluminum is 0.90 J/(g °C), what is the mass of the aluminum? (4 points)

Sorry i dont understand the question can you rephase it?

Muscle fiber i think that i right

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.