Cisplatin, a drug used in the treatment of certain cancers has the formula Pt(NH3)2 Cl2
Calculate the :
(a)Moles of compound in 136.5g cisplatin
(b)Number of hydrogen atoms in 1.22 mol cisplatin.
(c)Mass percent of platinum in cisplatin

Question

Cisplatin, a drug used in the treatment of certain cancers has the formula Pt(NH3)2 Cl2
Calculate the :
(a)Moles of compound in 136.5g cisplatin
(b)Number of hydrogen atoms in 1.22 mol cisplatin.
(c)Mass percent of platinum in cisplatin

anonymous · Answer

I just looked up the molecular wieght and it's 301.1 g per mole. You can find out how many moles there are in 136.5 grams by dividing it by the molecular weight. It looks to me like there are 6 hydrogens per molecule, so multiply Avogadro's number (the number of molecules in a mole of a compound, 6.022e23) by 6 hydrogens per molecule by 1.22. I guess the percent of Pt in the molecule would be the atomic weight of Pt (195) divided by the total (301) multiplied by 100: good luck with the maths

anonymous · Answer

tnx ;)