please help me to understand how you get an answer out of this question. -TIA
Choose the answer: a) SO2, b) SO3, c) N2O3, d) N2O5
2007-03-13 13:44:18 · 9 answers · asked by xxxladyxxx 1 in Science & Mathematics ➔ Chemistry
a)SO2, b) SO3, c) N2O3, d) N2O5
You take the molar mass of each of the compounds, i.e. S is 32.07, N is 14.00, O is 16.00.
You can automatically eliminate SO2 and N2O3 since its percent O is definitely is lower than SO3 and N2O5 respectfully.
Now..
b) SO3 Molar mass 32 + (16 x 3) = 80.
(16 x 3)/80 = 60%
d) N2O5 Molar mass 2 x 14 + (16 x 5) = 108.
(16 x 5)/108= 74%
Answer is d
2007-03-13 13:55:05 · answer #1 · answered by bolusoo 2 · 0⤊ 0⤋
As PERCENTAGES go, I would have thought
SO3 - because 75% is oxygen, wheras with N2O5, then surely, the oxygen (although 5) is actually only 71%
1:3 is higher than 2:5
Mark
2007-03-13 16:08:53 · answer #2 · answered by Mark T 6 · 0⤊ 0⤋
Make a little list
Compound Mol Wt WtO
SO2 64 32 half O
SO3 80 48 3/5 th O
N2O3 72 48 about 2/3 O
N2O5 108 80 looks like the one
2007-03-13 13:49:15 · answer #3 · answered by cattbarf 7 · 0⤊ 0⤋
d beacuse it says "0" wich stands for oxygen and "5" wich means 5 parts of oxygen. theres 5 parts of oxygen in answer choice d. 2 in a. 3 and b. 3 in c.
2007-03-13 13:47:55 · answer #4 · answered by kieran 2 · 0⤊ 0⤋
N2O5 ....
That compound has 5 oxygen's.
(O means oxygen and the number 5 is how many oxygen's it has)
2007-03-13 13:47:30 · answer #5 · answered by Steph 4 · 0⤊ 0⤋
N2O5
2 parts nitrogen and 5 parts oxygen
2007-03-13 13:46:51 · answer #6 · answered by Anonymous · 0⤊ 0⤋
N2O5
because it have 5 parts oxygen .
2007-03-13 14:44:48 · answer #7 · answered by gotarz 1 · 0⤊ 0⤋
SO3 - just guessing, i fell asleep in organic chemistry
2007-03-13 13:47:23 · answer #8 · answered by ropman1 4 · 0⤊ 0⤋
divide the molecular weight of the amount of oxygen by the molecular weight of the entire compound, and you have your percentage.
2007-03-13 13:47:37 · answer #9 · answered by pentech_99 2 · 1⤊ 0⤋