<u>Answer:</u> The balanced half reaction is written below.
<u>Explanation:</u>
Reduction reaction is defined as the chemical reaction in which an atom gains electrons. The oxidation number of the atom gets reduced during this reaction.
When oxygen gas is reduced to oxide ions, the number of electron transferred are 2
The chemical equation for the reduction of oxygen gas to oxide ions follows:
Hence, the balanced half reaction is written above.
Molality can be expressed by moles of solute over
kilograms of solvent. The question asks the molality of 0.25m NaCl. 0.25m NaCl
is equal to 0.25 moles of NaCl over 1 kg of water.
symbol ...................
<h3>
Answer:</h3>
3.072 L
<h3>
Explanation:</h3>
<u>We are given;</u>
- Initial pressure, P₁ = 345 torr
- Initial temperature,T₁ = -15°C
But, K = °C + 273
= -15°C + 273
= 258 K
- Initial volume, V₁ =3.48 L
- Final pressure, P₂ = 468 torr
- Final temperature, T₂ = 36°C
= 36 °C + 273
= 309 K
We are required to calculate the new volume, V₂
- Using the combined gas law;
P₁V₁/T₁ = P₂V₂/T₂
- We can calculate the new volume, V₂;
- Rearranging the formula;
V₂ =(P₁V₁T₂) ÷ (T₁P₂)
= (345 torr × 3.48 L × 309 K) ÷ (258 K × 468 torr)
= 3.072 L
Therefore, the new volume of the sample is 3.072 L
Answer:
yes it is true.
Explanation:
Because,
atomic number= no. of protons= no.of electrons
