Answer:
covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms
the sharing of electrons allows each atom to attain the equivalent of a full outer shell, corresponding to a stable electronic configuration.
Explanation:
A firework exploding is a chemical change as soon as you light the fuse the combustion reacts with the gunpowder.
I hope this helps, good luck!!!!
Answer: 
of NaOH
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
![pH=-\log [H^+]](https://tex.z-dn.net/?f=pH%3D-%5Clog%20%5BH%5E%2B%5D)
Putting in the values:
![10.020=-\log[H^+]](https://tex.z-dn.net/?f=10.020%3D-%5Clog%5BH%5E%2B%5D)
![[H^+]=9.55\times 10^{-11}](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D9.55%5Ctimes%2010%5E%7B-11%7D)
![[H^+][OH^-]=10^{-14}](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%5BOH%5E-%5D%3D10%5E%7B-14%7D)
![[OH^-]=\frac{10^{-14}}{9.55\times 10^{-11}}=1.05\times 10^{-4}M](https://tex.z-dn.net/?f=%5BOH%5E-%5D%3D%5Cfrac%7B10%5E%7B-14%7D%7D%7B9.55%5Ctimes%2010%5E%7B-11%7D%7D%3D1.05%5Ctimes%2010%5E%7B-4%7DM)
moles = 
Mass of 
Thus of NaOH is needed to prepare 463 mL of solution with a pH of 10.020
B. The heat from the reaction turns water to steam, which runs a generator.
<h3>Explanation</h3>
Here's what's going on within a <em>typical</em> nuclear power plant.
- The fuel bundle undergoes fission to release heat.
- A coolant such as molten salt flows across the reactor and transfers heat away from the fuel.
- The coolant is then passed into a heat exchanger. Cold water goes through the heat exchanger to absorb the heat. The coolant cools down and is recycled. Water heats up and boils to produce steam.
The rest of this process resembles that of a coal power plant.
- Steam from the heat exchanger goes through a turbine, which drives a generator.
- Some water condenses and is recycled.
<h3>Reference</h3>
Wikipedia contributors. "Nuclear reactor coolant." Wikipedia, The Free Encyclopedia. Wikipedia, The Free Encyclopedia, 13 Dec. 2018. Web. 27 Jan. 2019.
