Recognised as Musical note
C#5
- C#5
- 554.37 Hz
- MIDI 73
C#5 (enharmonically Db5) is MIDI note 73, sounding at 554.365 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 0.6187 m, and it sits in octave 5.
Pitch
Scientific pitch notationC#5
Enharmonic equivalentDb5the same pitch in equal temperament, spelled differently
MIDI note number73
Pitch classC# (1)
Octave5
As a sound wave
Wavelength in air0.6187 mat 343 m/s, dry air at 20 °C
Period1.8039 ms
Frequency one octave down277.183 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowC#4 · 277.18 Hz
Perfect fifth belowF#4 · 369.99 Hz
Semitone belowC5 · 523.25 Hz
Semitone aboveD5 · 587.33 Hz
Major third aboveF5 · 698.46 Hz
Perfect fifth aboveG#5 · 830.61 Hz
Octave aboveC#6 · 1,108.73 Hz
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Also reads as
NOTeCSHArP5 (chemical formula)
- Formula
- 397.505 g/mol
- 12 atoms
NOTeCSHArP5 has a molar mass of 397.505 g/mol, made up of 12 atoms across 8 elements: 1 × N, 1 × O, 1 × Te, 1 × C, 1 × S, 1 × H, 1 × Ar, 5 × P.
Molar mass
Molar mass397.505 g/mol
Total atoms per molecule12
Distinct elements8
Mass of one molecule6.6007258 × 10^-22 g
Molecules per gram1.5149849 × 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
N3.5%
O4%
Te32.1%
C3%
S8.1%
H0.3%
Ar10.1%
P39%
Nitrogen (N)14.007 g/mol, 3.524%
Oxygen (O)15.999 g/mol, 4.025%
Tellurium (Te)127.6 g/mol, 32.1%
Carbon (C)12.011 g/mol, 3.022%
Sulfur (S)32.06 g/mol, 8.065%
Hydrogen (H)1.008 g/mol, 0.254%
Argon (Ar)39.95 g/mol, 10.05%
Phosphorus (P × 5)154.87 g/mol, 38.961%
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