Recognised as Musical note
A#2
- A#2
- 116.54 Hz
- MIDI 46
A#2 (enharmonically Bb2) is MIDI note 46, sounding at 116.541 Hz in equal temperament with A4 = 440 Hz. Its wavelength in air is 2.9432 m, and it sits in octave 2.
Pitch
Scientific pitch notationA#2
Enharmonic equivalentBb2the same pitch in equal temperament, spelled differently
MIDI note number46
Pitch classA# (10)
Octave2
As a sound wave
Wavelength in air2.9432 mat 343 m/s, dry air at 20 °C
Period8.5807 ms
Frequency one octave down58.27 Hz
AudibleYeshuman hearing runs roughly 20 Hz to 20 kHz and narrows with age
Intervals from here
Octave belowA#1 · 58.27 Hz
Perfect fifth belowD#2 · 77.78 Hz
Semitone belowA2 · 110 Hz
Semitone aboveB2 · 123.47 Hz
Major third aboveD3 · 146.83 Hz
Perfect fifth aboveF3 · 174.61 Hz
Octave aboveA#3 · 233.08 Hz
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Also reads as
NOTeAsHArP2 (chemical formula)
- Formula
- 335.434 g/mol
- 8 atoms
NOTeAsHArP2 has a molar mass of 335.434 g/mol, made up of 8 atoms across 7 elements: 1 × N, 1 × O, 1 × Te, 1 × As, 1 × H, 1 × Ar, 2 × P.
Molar mass
Molar mass335.434 g/mol
Total atoms per molecule8
Distinct elements7
Mass of one molecule5.5700126 × 10^-22 g
Molecules per gram1.7953281 × 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
N4.2%
O4.8%
Te38%
As22.3%
H0.3%
Ar11.9%
P18.5%
Nitrogen (N)14.007 g/mol, 4.176%
Oxygen (O)15.999 g/mol, 4.77%
Tellurium (Te)127.6 g/mol, 38.04%
Arsenic (As)74.922 g/mol, 22.336%
Hydrogen (H)1.008 g/mol, 0.301%
Argon (Ar)39.95 g/mol, 11.91%
Phosphorus (P × 2)61.948 g/mol, 18.468%
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