Electrons are the thing in the outer energy levels
You would think that the bag of nails would have more mass but their masses are identical. <span>If you were to put them both in a vacuum chamber and let them fall from a great height, they would fall the same speed. The vacuum chamber would suck all of the air out of the cotton balls, thus making it heavier and weigh the same as the bag of nails.
Hopefully this is helpful and makes sense.</span>
Answer: chemical energy is converted to heat and light energy
Explanation: exothermic reaction
4CH3+7O2–>6 H2O+4CO2+energy
The presence of a large population of sludgeworms indicates water depleted of oxygen and a high level of organic pollution.
The sludgeworms Tubifex is harvested and sold as tropical fish food since it is common near sewer outlets and serves as a sign of water or organic pollution. Polychaetes are crucial in rearranging the silt on the ocean floor.
Organic contamination happens when too much organic material, such sewage or manure, gets into the water.
There will be more decomposers and sludgeworms in a pond as the organic content accumulates. These decomposers and sludgeworms develop quickly and consume a lot of oxygen as they do so.
Hence, Sludgeworms are a sign of an abundance of oxygen-depleted water and significant levels of organic pollutants.
Learn more about Water pollution here brainly.com/question/1235358
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Answer:</h3>
2NaOH(aq) + CaCl₂(aq) → 2NaCl(aq) + Ca(OH)₂(s)
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Explanation:</h3>
- The equation for the reaction between calcium chloride and sodium hydroxide to form calcium hydroxide and aqueous sodium chloride is given by;
2NaOH(aq) + CaCl₂(aq) → 2NaCl(aq) + Ca(OH)₂(s)
- It is an example of precipitation reaction in which a precipitate is formed as one of the products.
- During precipitation two aqueous solution combine to form a insoluble salt and a soluble salt.
