For the first question, i think the correct answer is the third option. When a gas is formed, it is <span>the most conclusive in determining whether a chemical reaction has taken place given that none of your reactants is a gas.
For the second question, the statement is true.
For the third question, the correct answer is the last option.</span>
The relationship between the surface area of a molecule and the strength of the intermolecular forces states that the larger the surface area, the weaker the intermolecular forces; Correct answer is True.
<h3>What are intermolecular forces?</h3>
Intermolecular forces are the forces that exist between the molecules of a substance.
The intermolecular forces present in a substance depends on the nature of the substance.
Also, the surface area of a substance affects the intermolecular forces present in the substances.
The greater the surface area, the stronger the intermolecular forces.
In conclusion, intermolecular forces exists between molecules of a substance.
Learn more about intermolecular forces at: brainly.com/question/24158505
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During the night. It usually forms after midnightish
Answer:
The unstable nucleus of radioactive atoms emit radiation.
Explanation:
When the atoms of an element have extra neutrons or protons it creates extra energy in the nucleus and causes the atom to become unbalanced and unstable, or radioactive.
(https://www.epa.gov/radtown/radtown-radioactive-atom-activity-4-atomic-stability)
The first step is to convert the 55 kg of Fe₃O₄ to moles by using the molar mass, that is, 231.55 g/mol (55 kg = 55000 gms),
55000 gms × 1 mole / 231.55 gms = 237.53 moles of Fe₃O₄
For the decomposition of every 1 mole of Fe₃O₄, +1118 kJ of energy is needed. Therefore, the energy needed to decompose 237.53 moles will be:
237.53 moles of Fe₃O₄ × 1118 kJ / 1 mole = 265558 kJ
Thus, there is a need of 265558 kJ of energy to decompose 55 kg of Fe₃O₄.