Determine the empirical formulas for the following compounds:
(a) caffeine, c8h1on4o2
(b)fructose, c12h22o11
(c)hydrogen peroxide, h2o2
(d) glucose, c6h12o6
(e) ascorbic acid (vitamin c), c6h8o6

a)C4H5N2O

b)C12H22O11

c)HO2

d)CH2O

e)C3H4O3

Explan ation:

To obtain th e empirical formul a from the molecular for mula you have to divide the subscripts by the largest whole number you can, that provide you a whole number for each one subscripts:

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

answer

the ions in solute supperate from eachouthere