Coder’s Logbook
Unicode Characters
| Character | Subscript | Unicode | Superscript | Unicode |
|---|---|---|---|---|
| 0 | ₀ |
U+2080 | ⁰ |
U+2070 |
| 1 | ₁ |
U+2081 | ¹ |
U+00B9 |
| 2 | ₂ |
U+2082 | ² |
U+00B2 |
| 3 | ₃ |
U+2083 | ³ |
U+00B3 |
| 4 | ₄ |
U+2084 | ⁴ |
U+2074 |
| 5 | ₅ |
U+2085 | ⁵ |
U+2075 |
| 6 | ₆ |
U+2086 | ⁶ |
U+2076 |
| 7 | ₇ |
U+2087 | ⁷ |
U+2077 |
| 8 | ₈ |
U+2088 | ⁸ |
U+2078 |
| 9 | ₉ |
U+2089 | ⁹ |
U+2079 |
| Plus (+) | ₊ |
U+208A | ⁺ |
U+207A |
| Minus (−) | ₋ |
U+208B | ⁻ |
U+207B |
| Equals (=) | ₌ |
U+208C | ⁼ |
U+207C |
| Parenthesis (() | ₍ |
U+208D | ⁽ |
U+207D |
| Parenthesis ()) | ₎ |
U+208E | ⁾ |
U+207E |
| Name | Symbol | Unicode | Common Use |
|---|---|---|---|
| Rightwards Arrow | → |
U+2192 | Reaction direction (yields) |
| Rightwards Harpoon | ⇀ |
U+21A0 | Top equilibrium arrow |
| Leftwards Harpoon | ↼ |
U+21BC | Bottom equilibrium arrow |
| Equilibrium Arrows | ⇌ |
U+21CC | Reversible reaction |
| Degree Sign | ° |
U+00B0 | Degrees Celsius (°C), standard state |
| Greek Delta | Δ |
U+0394 | Change in a value (e.g., ΔH) |
| Middle Dot | · |
U+00B7 | Hydrated compounds (e.g., CuSO₄·5H₂O) |
Examples:
- Glucose: C₆H₁₂O₆
- Sulfate Ion: SO₄²⁻
- Hydroxide Ion: OH⁻
- Hydronium Ion: H₃O⁺
- Carbon-14 Isotope: ¹⁴C
- A Hydrated Salt: CuSO₄·5H₂O
- Haber-Bosch Process: N₂ + 3 H₂ ⇌ 2 NH₃
- Standard Enthalpy of Formation: ΔH°f (This one mixes Markdown italics with Unicode!)
- Units: kJ mol⁻¹
Chemist’s Note: A key feature of sulfamic acid is that it is a stable, crystalline solid at room temperature, which makes it an excellent primary standard. This means you can weigh it out very accurately to make a solution of a precise concentration, which is then used to determine the exact concentration of another solution (like KOH).
Molarity
\[ \begin{align*} &= 0.150~\class{mjx-molar}{\mathrm{M}} \end{align*} \]
A 0.150 M aqueous solution of HCl…
Span Quantity
12.100 g
Overbar
12.00