If I needed to make a carbonated drink (soda), what steps would I
need to take in order to make sure the drink was sweet but stayed
carbonated? How would I make sure the sugar was able to dissolve?
How would I make sure the drink would stay carbonated?
Please help.

Explanation:

The simplest way ta make a carbonated drink is to use seltzer water, club soda, or sparkling mineral water.

1. To sweeten the drink

You could use honey instead of sugar to sweeten your drink. To make a simple honey syrup, just combine some honey with water and heat on medium-high until the honey has dissolved. Then, set it aside to cool.

2. To make sure the drink stays carbonated

To keep the CO₂ from escaping, you could seal the bottle with a wine bottle stopper  — like the one below — or a simple rubber stopper.

if you mean hydrogen and oxygen then water is the product

the dissolution of polymer can be thermodynamically described in 2 steps.