Cis-Platin is a chemotherapy drug that has the formula PtCl2(NH3)2. If you have 402.00 grams of cis-platin, how many grams of nitrogen would it contain? Enter your answer in scientific notation. For example 3.14E-6.
i don't understand how to go around doing that either
help please
2007-12-04 12:55:01 · 4 answers · asked by DDTHAPPINESS 5 in Science & Mathematics ➔ Chemistry
Thank you everybody!
2007-12-04 13:10:03 · update #1
Atomic weights: Pt=195 Cl=35.5 N=14 H=1 NH3=17 PtCl2(NH3)2=300
Let cisplatin be called CP
402gCP x 1molCP/300gCP x 2molN/1molCP x 14gN/1molN = 37.5g N
2007-12-04 13:06:08 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
Calculate the molecular mass of the compound (or look it up), and from there, your grams nitrogen would just be a gravimetric factor, or grams nitrogen/grams total. There are 2 nitrogens in the compound, so that would be 28.00 grams. Put that over the entire molecular mass. Then you can set up a proportion.
28g/MM Cis-platin = x grams nitrogen/402 g cis platin
and solve for grams nitrogen.
2007-12-04 21:07:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Find the % of nitrogen in Cis platin. In cis platin, you have 2 nitrogens, so the % by weight of nitrogen would be (2 x weight of nitroogen)/(weight of cis platin). Multiply this percentage by the amount of cis platin you have (which is 402 grams).
2007-12-04 21:06:48 · answer #3 · answered by Unnecessary 2 · 0⤊ 0⤋
(402.00g cis)(1 mol cis / 300.00 molar grams cis) (2 mol N / 1 mol cis) (14.01 molar grams N / 1 mol N) = 37.55 grams.
Normally you wouldn't put such a "normal" number in scientific notation but if you must then it is 3.755E1
2007-12-04 21:09:20 · answer #4 · answered by David Feldman 2 · 0⤊ 0⤋