Answer:
at 181.0
is -723.3 kJ/mol.
Explanation:
We know,
where, T is temperature in kelvin.
Let's assume and
does not change in the temperature range 25.0
- 181.0
.
= (273+181.0) K = 454.0 K
Hence, at 181.0 ,
= -723.3 kJ/mol
What is the value of work done on an object when a 70–newton force moves it 9.0 meters in the same direction as the force? A. 7.
2 answers:
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Answer:
5.56 × 10⁻⁸
Explanation:
Step 1: Given data
- Concentration of the weak acid (Ca): 0.187 M
- pH of the solution: 3.99
Step 2: Calculate the concentration of H⁺
We will use the following expression.
pH = -log [H⁺]
[H⁺] = antilog -pH = antilog -3.99 = 1.02 × 10⁻⁴ M
Step 3: Calculate the acid dissociation constant (Ka)
We will use the following expression.