2Cu + S = Cu₂S
S⁰ + 2e⁻ = S⁻²
Cu⁰ - 1e⁻ = Cu⁺¹
A sulfur atom gains two electrons.
Answer : The volume of stock solution needed are, 12.5 mL
Explanation :
Formula used :
where,
are the initial molarity and volume of copper (II) chloride.
are the final molarity and volume of stock solution of copper (II) chloride.
We are given:
Putting values in above equation, we get:
Hence, the volume of stock solution needed are, 12.5 mL
Answer: D. It reacts with oxygen in the presence of moist air.
Explanation:
The element Gold, does not react with oxygen,hence it is not affected by corrosion,neither does it rust.
Answer:
A hypothesis or a model is called falsifiable if it is possible to conceive of an experimental observation that disproves the idea in question.
