Recognised as Musical note
F#2
- F#2
- 92.5 Hz
- MIDI 42
F#2 (enharmonically Gb2) is MIDI note 42, sounding at 92.499 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 3.7082 m, and it sits in octave 2.
Pitch
Scientific pitch notationF#2
Enharmonic equivalentGb2the same pitch in equal temperament, spelled differently
MIDI note number42
Pitch classF# (6)
Octave2
As a sound wave
Wavelength in air3.7082 mat 343 m/s, dry air at 20 °C
Period10.811 ms
Frequency one octave down46.249 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowF#1 · 46.25 Hz
Perfect fifth belowB1 · 61.74 Hz
Semitone belowF2 · 87.31 Hz
Semitone aboveG2 · 98 Hz
Major third aboveA#2 · 116.54 Hz
Perfect fifth aboveC#3 · 138.59 Hz
Octave aboveF#3 · 185 Hz
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Also reads as
NOTeFSHArP2 (chemical formula)
- Formula
- 311.57 g/mol
- 9 atoms
NOTeFSHArP2 has a molar mass of 311.57 g/mol, made up of 9 atoms across 8 elements: 1 × N, 1 × O, 1 × Te, 1 × F, 1 × S, 1 × H, 1 × Ar, 2 × P.
Molar mass
Molar mass311.57 g/mol
Total atoms per molecule9
Distinct elements8
Mass of one molecule5.1737416 × 10^-22 g
Molecules per gram1.9328372 × 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
N4.5%
O5.1%
Te41%
F6.1%
S10.3%
H0.3%
Ar12.8%
P19.9%
Nitrogen (N)14.007 g/mol, 4.496%
Oxygen (O)15.999 g/mol, 5.135%
Tellurium (Te)127.6 g/mol, 40.954%
Fluorine (F)18.998 g/mol, 6.098%
Sulfur (S)32.06 g/mol, 10.29%
Hydrogen (H)1.008 g/mol, 0.324%
Argon (Ar)39.95 g/mol, 12.822%
Phosphorus (P × 2)61.948 g/mol, 19.883%
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