Metals are very good conductors of electricity, while nonmetals are not. what does this say about the metalloids?

a. they are more like nonmetals and similarly cannot conduct electricity well.

b. they can sometimes conduct electricity, and, when they do, they do it as well as metals.

c. they are more like metals and can conduct electricity just as well as metals.

d. they can sometimes conduct electricity, but they do not do it as well as metals can.

i think b.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !