Question

can any body explain me how to find molecular formulae

Answer 1

Hey mate here is ur answer......

Start with the number of grams of each element, given in the problem.

Convert the mass of each element to moles using the molar mass from the periodic table.

Divide each mole value by the smallest number of moles calculated.

Round to the nearest whole number. This is the mole ratio of the elements and is.

HOPE IT HELPS ☺️

Answer 2

Hi......

Calculate the empirical formula mass.

Divide the gram molecular mass by the empirical formula mass.

Multiply each of the subscripts within the empirical formula by the number calculated in Step 2.

Here‘s an example: What is the molecular formula of a compound that has a gram molecular mass of 34 g/mol and the empirical formula HO?

Calculate the empirical formula mass.

You determine this number by finding the mass of HO (1 hydrogen atom and 1 oxygen atom).



So, the empirical formula mass is 17.01 g/mol.

Divide the gram molecular mass by the empirical formula mass.

Dividing the gram molecular mass by this value yields the following:



Multiply each of the subscripts within the empirical formula by the number calculated in Step 2.

Multiplying the subscripts within the empirical formula by this number gives you the molecular formula H2O2. This formula corresponds to the compound hydrogen peroxide.

HOPE YOU UNDERSTAND