The standard atomic weight of platinum is 195,084 g.
195,084 g-------------------------------1 mol
250 g-------------------------------------x mol
x = 250/195,084 = 1,28 mol platinum
250 g of platinum is equal to 1,276 moles.
254 g of platinum contain 7,84.10e23 atoms.
1.28 moles
48,177 134 32.1023 atoms
2
The chemical formula of propane is C3H8; 11 atoms are present in the molecule.
No
24
6.00 moles
4 oxygen atoms are present
48,177 134 32.1023 atoms
The element platinum has only one atom.
481,7713432.1023 atoms
two atoms
The total no. of atoms present in C12H22O11 is 45.
The number of atoms is indicated by coefficients.
2
4 oxyzen atoms
The chemical formula of propane is C3H8; 11 atoms are present in the molecule.
The number of atoms is 33.