A sugar solution with sand can be separated by dissolving the solution into water, then the sugar will be dissolved with the water and the sand will stay on the bottom of the water.
Combination therapy is the most effective treatment for HIV. I hope this help
It can cause the alligators to become endangered or extinct because if there are not enough fertile males then they can not reproduce and will eventually die out.
So first we need to know what the formulas are:
Methane: 
Oxygen: 
Carbon Dioxide: 
Water: 
So then we follow the equation as specified in the question. Note that it does not need to be balanced, as the question states it wants the unbalanced equation:
→ 
This is the preliminary, unbalanced equation with the correct chemical formulas.