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84-100%
77-x%
x=77*100/84≈91,67%
The statement "Heating chemicals is defined by the process of combustion" is false, combustion is a chemical reaction in which fuels combine with oxygen from the air to release heat.
<h3>What is combustion?</h3>
- It is a rapid oxidation process of certain fuel elements, that is, consisting mainly of hydrogen, carbon and sometimes sulfur.
- All combustion processes require the participation of an oxidant, mainly oxygen from the air.
- It is based on the exothermic chemical reaction of a substance or mixture of substances called fuel.
Therefore, we can conclude that a combustion process is a type of exothermic reaction that causes a rapid oxidation process therefore the statement "Heating chemicals is defined by the process of combustion" is false.
Learn more about the process of combustion here: brainly.com/question/17580726
Answer: 3, 2, 1
Explanation: i was a B student in chemistry and we learned this first hand.
Because statistics keep on changing and there are many factors that can affect the investigation
