29. When 84.8 g of iron(III)
oxide reacts with an excess
of carbon monoxide, iron is
produced
Fe, O3(s) + 3C0(g) — —
2Fe(s) + 3C02(g)
What is the theoretical yield
of iron?

60.0 - there are 3 significant numbers

The answer to your q the total mass is 73

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.

I'm pretty sure its c