Explain the units and how to solve the following metric convertion then solve the metric conversion by filling in the blank 12 km = m,

Kilometre and meter both are the units which is used to determine the length.

Kilometre and meter both are the metric measurement and abbreviated as km and m. Conversion of km into m include the multiplication of length with the conversion ratio. 1 km is equal to 1000 m. Thus, by multiplying with 1000, given length in km can be converted to m.

Since, 1 km = 1000 m.

Then, 12 km = m

= 12000 m.

Hence, 12 km = 12000 m

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 !