K + S = K2S
Potassium reacts with sulfur to produce potassium sulfide
the answer is A.) because the scientific method is used to answer problems.
This is the steps,
STEP 1: ask a question
STEP 2: state your hypothesis
STEP 3: conduct an experiment
STEP 4: analyze your results
STEP 5: make a conclusion
Explanation:
Ethanol is an alcohol with a wide range of usage to man. It's production is desirable for the following reasons:
- It is a source of energy: ethanol burns like fossil fuels to produce clean and efficient energy for use. In some countries, automobile engines are now designed to consume ethanol instead of fossil fuels.
- It is a renewable source of energy since it is completely produced from biomass. Ethanol is desired because it can easily be replenished when depleted by consumption.
- Producing energy from ethanol is an environmental friendly process. It absorbs more carbon dioxide from the environment. Plants that are used in producing ethanol are cultivated and they act as carbon dioxide absorbers.
- Ethanol burns more cleanly and effectively thereby reducing pollution in the environment.
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