Answer:
A)Molecular formula of ibuprofen is
B)Molecular formula of Cadaverine is
C)Molecular formula of Epinephrine is
Explanation:
Percentage of an element in a compound:
A) Ibuprofen, a headache remedy, contains 75.69% C, 8.80% H, and 15.51% O by mass.
Molar mass of ibuprofen = 206 g/mol.
Let the molecular formula of ibuprofen be =
Number of carbon atoms in 1 molecule of ibuprofen ;
Number of hydrogen atoms in 1 molecule of ibuprofen ;
Number of oxygen atoms in 1 molecule of ibuprofen ;
Molecular formula of ibuprofen :
=
B) Cadaverine contains 58.55% C, 13.81% H, and 27.40% N by mass
Molar mass of Cadaverine = 102.2 g/mol.
Let the molecular formula of Cadaverine be =
Number of carbon atoms in 1 molecule of Cadaverine ;
Number of hydrogen atoms in 1 molecule of Cadaverine ;
Number of nitrogen atoms in 1 molecule of Cadaverine ;
Molecular formula of Cadaverine :
=
C) Epinephrine contains 59.0% C, 7.1% H, 26.2% O, and 7.7% N by mass
Molar mass of Epinephrine = 180 g/mol.
Let the molecular formula of Epinephrine be =
Number of carbon atoms in 1 molecule of Epinephrine ;
Number of hydrogen atoms in 1 molecule of Epinephrine ;
Number of oxygen atoms in 1 molecule of Epinephrine ;
Number of nitrogen atoms in 1 molecule of Epinephrine ;
Molecular formula of Epinephrine :
=