Which statement is true about trends in metallic character? a) metallic character increases as you go to the right across a row in the periodic table and as you go down a column. b) metallic character decreases as you go to the right across a row in the periodic table and increases as you go down a column. c) metallic character decreases as you go to the right across right across a row in the periodic table and decreases as you go down a columnd) metallic characterdecreases as you go to the right across a row in the periodic table and increases as you go down a column

d) Metallic character decreases as you go to the right across a row in the periodic table and increases as you go down a column.

Explanation:

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 !

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)