Answer:
(d) All spontaneous reactions have a negative free-energy change
Explanation:
All spontaneous reactions releases free energy which can be used later for the work to be done. A reaction with a negative value for ΔG releases free energy and is thus spontaneous
If you want you can repost this question with a picture but I need to see it in order to help you , or you can read the picture I added for you
<h3>
Answer:</h3>
The root mean square speeds of O₂ and UF₆ is 513m/s and 155 m/s respectively.
<h3>
Solution and Explanation:</h3>
- To find how fast molecules or particles of gases move at a particular temperature, the root mean square speed is calculated.
- Root mean square speed of a gas is calculated by using the formula;

Where R is the molar gas constant, T is the temperature and M is the molar mass of gas in Kg.
<h3>Step 1: Root mean square speed from O₂</h3>
Molar mass of Oxygen is 32.0 g/mol or 0.032 kg/mol
Temperature = 65 degrees Celsius or 338 K
Molar gas constant = 8.3145 J/k.mol


<h3>
Step 2: Root mean square speed of UF₆ </h3>
The molar mass of UF₆ is 352 g/mol or 0.352 kg/mol


Therefore; the root mean square speeds of O₂ and UF₆ is 513m/s and 155 m/s respectively.
Answer:
The required ratio would be 2:1
Answer:
[H⁺] = 5.011 × 10⁻³ mol.L⁻¹
Explanation:
The pH is converted into concentration of H⁺ as,
[H⁺] = 10^-pH
Where 10 is antilog,
So, putting values,
[H⁺] = 10⁻²·³
[H⁺] = 0.00501
Or,
[H⁺] = 5.011 × 10⁻³ mol.L⁻¹