Answer:
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Explanation:
The one variable that is changed during an experiment is called an independent variable.
The correct answer is the third option. Particulate matter is the air pollutant known to affect people with a heart disease. According to research, this pollutant is associated with an increased risk of cardiovascular diseases.
Sulphur trioxide reacts with water to form a solution of sulphuric acid.
The equation describing this reaction is:
SO3 + H2O .............> H2SO4
Based on the above equation, the formula of the compound formed when sulphur trioxide reacts with water is: H2SO4
Aluminium and copper will conduct electricity because their free electrons can roam about while electrons in the other substances or involved in the bonding process itself. Metallic bonds form because of the attraction of negative free electrons and positive cations that are fixed. The bond is maintained as the unattached electrons are shared.