Question

Calculate number of atoms in 18 g of water?? Ans if u know

Answer 1

no id atoms 18 g and water is H2o=1×2+16 = 18 u 18/18 =1g

Answer 2

DATA:
         Given Mass = 18g
          Actual mass of water = H20
                                            = (1x2)+(16)
                                            = 18g
          Avagadro's Number = 6·02×10²³ atoms

SOLUTION:

    ∵ No of Atoms = Avagadro's No. x Given Mass/Actual Mass

HERE;
          No of Atoms = (6·02×10²³) x 18/18

        No. of atoms = 6·02×10²³ atoms.