Science ! ( 40 pts )

the equation above is not balanced. in the balanced equation, what coefficient would be in front of the iron on the reactant side?

1
2
3
4

in an exothermic reaction, what happens to heat?

it is released.
it is absorbed.
the amount of heat does not change.
heat creates a weak acid buffer.

which is not a factor that can affect the rate of a reaction?

color of reactants
temperature
pressure
amount of reactants

how much sodium chloride would be weighed out if 3 moles of the molecule were needed? *
nacl has an atomic mass of 58.44

19.48 g
116.88 g
175.32 g
not possible to have this much sodium chloride