Recognised as Musical note
C4
- C4
- 261.63 Hz
- MIDI 60
C4 is MIDI note 60, sounding at 261.626 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 1.311 m, and it sits in octave 4.
Pitch
Scientific pitch notationC4
MIDI note number60
Pitch classC (0)
Octave4
As a sound wave
Wavelength in air1.311 mat 343 m/s, dry air at 20 °C
Period3.8223 ms
Frequency one octave down130.813 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowC3 · 130.81 Hz
Perfect fifth belowF3 · 174.61 Hz
Semitone belowB3 · 246.94 Hz
Semitone aboveC#4 · 277.18 Hz
Major third aboveE4 · 329.63 Hz
Perfect fifth aboveG4 · 392 Hz
Octave aboveC5 · 523.25 Hz
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Also reads as
NOTeC4 (chemical formula)
- Formula
- 205.65 g/mol
- 7 atoms
NOTeC4 has a molar mass of 205.65 g/mol, made up of 7 atoms across 4 elements: 1 × N, 1 × O, 1 × Te, 4 × C.
Molar mass
Molar mass205.65 g/mol
Total atoms per molecule7
Distinct elements4
Mass of one molecule3.4148986 × 10^-22 g
Molecules per gram2.9283446 × 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
N6.8%
O7.8%
Te62%
C23.4%
Nitrogen (N)14.007 g/mol, 6.811%
Oxygen (O)15.999 g/mol, 7.78%
Tellurium (Te)127.6 g/mol, 62.047%
Carbon (C × 4)48.044 g/mol, 23.362%
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