Question

empirical formula note.....​

Answer 1

Answer:

Empirical formula CH2O

Empirical formula weight =12 +2+16=30

Molecular weight =180

n=Molecular weight/empirical weight =180/30=6

Molecular formula =(Empirical formula)n

Molecular formula =(CH2O)6

MF=C6H12O6

Answer 2

Answer:

You can use the empirical formula to find the molecular formula if you know the molar mass of the compound. To do this, calculate the empirical formula mass and then divide the compound molar mass by the empirical formula mass. This gives you the ratio between the molecular and empirical formulas. Multiply all of the subscripts in the empirical formula by this ratio to get the subscripts for the molecular formula.compound is analyzed and calculated to consist of 13.5 g Ca, 10.8 g O, and 0.675 g H. Find the empirical formula of the compound.

Start by converting the mass of each element into moles by looking up the atomic numbers from the periodic table. The atomic masses of the elements are 40.1 g/mol for Ca, 16.0 g/mol for O, and 1.01 g/mol for H.