can someone please show me step by step how to do these?
a) empirical formula: CH2; molar mass: 42g/mol
b) empirical formula: CH; molar mass: 78g/mol
c) empirical formula: NO2; molar mass: 92g/mol
thank you very much
2007-05-22 05:41:34 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
a)mass of CH2 = 14 ; 42 / 14 = 3
C3H6
b) mass of CH = 13 ; 78 / 13 = 6
C6H6
c) mass NO2 = 46 ; 92 / 46 = 2
N2O4
2007-05-22 05:47:29 · answer #1 · answered by Anonymous · 0⤊ 1⤋
Figure out the "empirical formula weight," which is not a standard term.
For CH2 it is 14
Divide the molar mass by the EFW
42 / 14 to get three
Multiply the CH2 by 3 to get C3H6, the molecular formula.
2007-05-22 05:46:26 · answer #2 · answered by ChemTeam 7 · 1⤊ 0⤋
ans a) molecular formulae is C3H6
ans b) molecular formulae is C6H6
ans c) molecular formulae is N2O4
2007-05-22 05:52:01 · answer #3 · answered by Anirudh R 1 · 0⤊ 0⤋
a) C3H6
b) C6H6
c) N2O4
2007-05-22 05:53:37 · answer #4 · answered by ag_iitkgp 7 · 1⤊ 0⤋