Answer: The mass of aluminium sample is 55.4 gram
Explanation:
As we know that,
where,
= mass of aluminium = ?
= mass of water = 300.0 g
= final temperature =
= temperature of aluminium =
= temperature of water =
= specific heat of aluminium =
= specific heat of water =
Now put all the given values in equation (1), we get
Therefore, the mass of aluminium sample is 55.4 gram
The atoms start vibrating faster
Answer:
Its when like two pure substances are like combined into one.
Explanation:
Answer:
2.30 × 10⁻⁶ M
Explanation:
Step 1: Given data
Concentration of Mg²⁺ ([Mg²⁺]): 0.039 M
Solubility product constant of Mg(OH)₂ (Ksp): 2.06 × 10⁻¹³
Step 2: Write the reaction for the solution of Mg(OH)₂
Mg(OH)₂(s) ⇄ Mg²⁺(aq) + 2 OH⁻(aq)
Step 3: Calculate the minimum [OH⁻] required to trigger the precipitation of Mg²⁺ as Mg(OH)₂
We will use the following expression.
Ksp = 2.06 × 10⁻¹³ = [Mg²⁺] × [OH⁻]²
[OH⁻] = 2.30 × 10⁻⁶ M