Has markings along the cylinder/beaker that indicate the volume of liquid inside them. .
If present in a high amount, unsaturated fat makes a substance an unhealthy choice in a recipe.
The correct answer is letter A: <span>Unlike junction diodes, point-contact diodes are enclosed in a suitable casing and have terminals for connecting them to a circuit.</span>
Answer:
Two
Explanation:
I believe your unbalanced equation should be
H₂O₂ + I₂ ⟶ IO₃⁻
The half-reactions and the overall reaction are:
5 × [H₂O₂ + 2H⁺ +2e⁻ ⟶ 2H₂O]
1 × <u>[ I₂ + 6H₂O ⟶ 2IO₃⁻ + 12H⁺ + 10e⁻]
</u>
5H₂O₂ + I₂ ⟶ 2IO₃⁻ + 2H⁺ + 4H₂O
The reaction needs two hydrogen ions for balancing.
Answer:
pH = 8.48
Explanation:
HOBr dissociates in water as follows:
- HOBr(aq) ↔ H⁺(aq) + OBr⁻(aq)
With a ka expressed by:
- ka = [H⁺]*[OBr⁻] / [HOBr]
We rearrange and <u>solve for [H⁺]</u>:
- [H⁺] = ka * [HOBr] / [OBr]
Because the volume is 1 L, the moles added of HOBr and KOBr (OBr⁻) are also the molar concentration:
- [H⁺] = 2.0x10⁻⁹ * 0.50 / 0.30
Finally we <u>calculate the pH</u>:
