C ITS C do not listen but it’s c do not listen me
WHat's a concept map again?
I forgot...
a. Elemental percent composition is the mass percent of each element in the compound.
The formula for mass elemental percent composition =
(1)
The molecular formula of cisplatin is
.
The atomic weight of the elements in cisplatin is:
Platinum, 
Nitrogen, 
Hydrogen, 
Chlorine, 
The molar mass of
=
= 
The mass of each element calculated using formula (1):
- Platinum,
%
%.
- Nitrogen,
%
%
- Hydrogen,
%
%
- Chlorine,
%
%
b. The given reaction of cisplatin is:

According to the balanced reaction, 1 mole of
gives 1 mole of
.
Now, calculating the number of moles of
in 100.0 g.
Number of moles = 
Molar mass of
= 
Number of moles of
=
.
Since, 1 mole of
gives 1 mole of
. Therefore, mass of cisplatin is:

For mass of
:
Molar mass of
= 
Since, 1 mole of
gives 2 mole of
. Therefore, mass of
is:

Mass = mr x moles
Mr of CuCl2 = ( 63.5) + ( 35.5 x 2) = 134.5
2.5 = 134.5 x moles
2.5 / 134.5 = moles
Moles = 0.019 (2DP)
0.25g of Al
Mr of Al = 27
0.25 = 27 x moles
0.25/ 27 = 0.0093 moles (2sf)
Hope this helps :)