A12.95 g sample of mo2o3(s) is converted completely to another molybdenum oxide by adding oxygen. the new oxide has a mass of 13.82 g. add subscripts below to correctly identify the empirical formula of the new oxide.

Answer : The empirical formula of the new oxide will be .

Explanation :

First we have to calculate the moles of .

Molar mass of = 240 g/mole

Now we have to calculate the moles of 'Mo'.

As, 1 mole of contains 2 mole 'Mo'

So, 0.0539 mole of contains mole 'Mo'

Now we have to calculate the mass of 'Mo'.

Molar mass of Mo = 95.96 g/mole

Now we have to calculate the mass of oxygen.

Mass of oxygen = 13.82 - 10.34 = 3.48 g

Now we have to calculate the moles of oxygen.

Now we have to calculate the ratio of 'O' and 'Mo'.

Now 3 oxygen are added in , we get the new formula of  oxide.

The new formula of oxide =

Hence, the empirical formula of the new oxide will be .

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 mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).