Answer:
Sodium is a very reactive metal, it tends to react with oxygen to form sodium oxide but this is an unstable compound and soon reacts with hydrogen to form sodium hydroxide. Sodium is the metal reacts vigorously with oxygen and water.
4 Na + O2 → 2 Na2O.
The purpose<span> of preparing </span>Set-up<span> _ is to act as a </span>control set-up<span> to ensure that the (measured variable) is only caused by the(changed variable) and not any other variables in the experiment.</span>
Explanation:
ask them out but it may not work
Answer:
Plants ➯ Mouse ➯ Snake ➯ Hawk ➯ Sun
Explanation:
<em>In Order As A Food Chain </em>
Answer:
Explanation:
reduction potential of NO gas is highly unfavourable . It is - 1.7 V . So it is highly unlikely to be reduced to NO⁻ . On the other hand it is easily oxidised .
Half cell reaction of given cell
At anode ( where oxidation occurs )
NO⁻ ⇒ NO + e ( reduction potential is - 1.7 V )
At cathode ( where reduction takes place )
Br₂ + 2e ⇒2 Br⁻ ( reduction potential is 1.09 V )
(NO⁻ ⇒ NO + e ) x 2
Br₂ + 2e ⇒2 Br⁻
--------------------------------
Br₂ + 2NO⁻ ⇒ 2NO +2 Br⁻
Ecell = Ecathode - E anode
= 1.09 - 2 x ( - 1.7)
4.5 V
