Determine the volume in cm3 of 7.2 x 10-4 m3 ?

The volume of is equal to 720 cm³.

Explanation:

We know that,

1 m = 100 cm

We need to convert to cm³.

Also,

1 m³ = 10⁶ cm³

To convert   to cm³, the step is as follows :

So, is equal to 720 cm³.

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 !