Empirical and Molecular Formulas

[906155996]

In a problem, how is it that you can figure out the molar ratio, in many of the manual problems it says we use the molar ratio, yet how would that be figured out?

[Jimin_Kim_3C]

Hi,

In a problem, the molar ratio can be figured out through the coefficients of the molecule/element. The coefficients give you the moles to use in the molar ratio.

The molar ratio is the moles of one molecule over the moles of another molecule and the molar ratio allows you to obtain the product moles when given the reactant moles.

Hope that helps!

[Rebecca Kam 3D]

The molar ratio is the comparison of the number of moles in a balanced equation by looking at the coefficients in the front. For example, for 2H2 + O2 -> 2H2O. So there is a molar ratio of 1:2 for O2 and H2O, which means that for every one mole of O2, 2 moles of H2O are formed too.

[nyireess]

Molar ratio can be found by comparing the coefficients of two reactants/two products or a reactant/product. For example in , 2H2 + 2O2 --> 4H2O2, the molar ratio of H2 to H2O2 would be 2:4 or 1:2. Hope this helps!

[205957986]

to find the molar ratio:

1. calculate the molar mass of each substance by determining their molecular weight
2. divide substance 2 by substance one by taking their molar masses and plugging it into the formula