B.) They all travel at the same speed
There will be a maximum of 2 electrons that can <span>occupy a single molecular orbital. They will have opposite spins. Hope this answers the question. Have a nice day. Feel free to ask more questions. Have a nice day.</span>
Think of it this way: it is a distribution problem in which you are multiplying the 2 on the outside with each element in the parentheses. Oxygen does not have a number in front of it, so put an imaginary one in front of it to help you. Do the same with Hydrogen since it doesn't have a number in front of it either. Now you know that hydrogen has one ion and oxygen has one... but you must now multiply each of the elements' ions by two. You should now know that Oxygen has 2 ions in Calcium Hydroxide and that there are also 2 ions of Hydrogen in Calcium Hydroxide. Does this make sense?
Answer:
1. KNO3(s) ------> K^+(aq) + NO3^-(aq)
2. The dissolution is endothermic
3. The sign of the enthalpy of dissolution is positive
Explanation:
The sign of the enthalpy of dissolution depends on the hydration energy and the lattice energy.
For KNO3, the hydration energy is less than the lattice energy hence the dissolution is endothermic and the enthalpy of dissolution is positive.