Recognised as Musical note
F#9
- F#9
- 11,839.82 Hz
- MIDI 126
F#9 (enharmonically Gb9) is MIDI note 126, sounding at 11,839.822 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 0.029 m, and it sits in octave 9.
Pitch
Scientific pitch notationF#9
Enharmonic equivalentGb9the same pitch in equal temperament, spelled differently
MIDI note number126
Pitch classF# (6)
Octave9
As a sound wave
Wavelength in air0.029 mat 343 m/s, dry air at 20 °C
Period0.0845 ms
Frequency one octave up23,679.643 Hzdoubling the frequency
Frequency one octave down5,919.911 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowF#8 · 5,919.91 Hz
Perfect fifth belowB8 · 7,902.13 Hz
Semitone belowF9 · 11,175.3 Hz
Semitone aboveG9 · 12,543.85 Hz
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Also reads as
NOTeFSHArP9 (chemical formula)
- Formula
- 528.388 g/mol
- 16 atoms
NOTeFSHArP9 has a molar mass of 528.388 g/mol, made up of 16 atoms across 8 elements: 1 × N, 1 × O, 1 × Te, 1 × F, 1 × S, 1 × H, 1 × Ar, 9 × P.
Molar mass
Molar mass528.388 g/mol
Total atoms per molecule16
Distinct elements8
Mass of one molecule8.7740892 × 10^-22 g
Molecules per gram1.1397194 × 10^21
Name
NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show
Composition by mass
N2.7%
O3%
Te24.1%
F3.6%
S6.1%
H0.2%
Ar7.6%
P52.8%
Nitrogen (N)14.007 g/mol, 2.651%
Oxygen (O)15.999 g/mol, 3.028%
Tellurium (Te)127.6 g/mol, 24.149%
Fluorine (F)18.998 g/mol, 3.595%
Sulfur (S)32.06 g/mol, 6.068%
Hydrogen (H)1.008 g/mol, 0.191%
Argon (Ar)39.95 g/mol, 7.561%
Phosphorus (P × 9)278.766 g/mol, 52.758%
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