A1.000-g sample of lead shot reacted with oxygen to give 1.077 g of product. calculate the empirical formula of the lead oxide

 The empirical  formula  of  lead oxide  is  PbO

  Calculation

Step  1:  find the  mass  of  oxygen that reacted

  =mass of the product- mass  of lead

= 1.077 g - 1.000 =0.077 g

Step 2:  find  the mole of each reactant

 moles = mass/molar mass

the molar mass of Pb  =207 g/mol  while that of O = 16g/mol from periodic table

moles of lead(Pb)  is therefore = 1.000 g / 207 g/mol =0.0048  moles

  moles of O2  =0.077g/16 g/mol =0.0048 moles

Step  3:  find the mole  ratio

that is divide each mole by smallest number of mole (0.0048)

Pb = 0.0048/0.0048 =1

O=0.0048/0.0048 =1

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i