Avase is said to be solid platinum it is found to displace 18.65 ml of water and has a mass of 157 g what is the density of the vase

density of the vase = 8.418 g / mL

Explanation:

Density is equal to mass of the platinum vase divided by the volume of water displaced.

density = mass / volume

density of the platinum vase = 157 g / 18.65 mL = 8.418 g / mL

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 !