Answer:
True.
Explanation:
An exothermic reaction has a positive enthalpy (heat) of reaction. However, it can be negative in some circumstances.
Answer:
pH = 13.1
Basic
Explanation:
Step 1: Given data
Hydrogen ion concentration ([H⁺]): 6.7 × 10⁻¹⁴ M
Step 2: Calculate the pH of the solution
We will use the definition of pH.
pH = -log [H⁺]
pH = -log 6.7 × 10⁻¹⁴ = 13.1
- When pH < 7, the solution is acid.
- When pH = 7, the solution is neutral.
- When pH > 7, the solution is basic.
Since pH > 7, the solution is basic.
Answer: A new model of the atom that described electrons as being in a cloud
Explanation:
I believe it's 6789 times 10^4. I could be wrong, due to the fact that I don't remember what's the definition of the scientific notion. I hope this helps, or at least gives you an idea! :D
The atomic number is always equal to the number of protons. It will be equal to the number of elections also if the atom has a neutral charge.
If you find my answer helpful, please brainliest me!
