Answer: option <span>C: H2O(l) at 10°C changes to H2O(l) at 20°C
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Explanation:
To solve this questions use the fact the temperature is a measure of the average kinetic energy of the particles of a substance.
For a given substance, the higher the temperature the higher kinetic energy, the lower the temperature the lower the kinetic energy
That is a statement derived from the kinetic theory.
The kinetic energy states that as the temperature of a substance increases, so do the average velocity of its particles and so the average kinetic energy.
Thas is why gases have a higher kinetic energy than liquids and liquids have a higher kinetic energy than solids.
The options A<span>: H2O(s) changes to H2O(l) at 0°C and B: H2O(l) changes to H2O(s) at 0°C describe changes at constant temperature, so in them the average kinetic energy does not change.</span><span>
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</span><span>The option C: H2O(l) at 10°C changes to H2O(l) at 20°C, as said, is the right answer because it is a process in which the temperature is increasing, so the average kinetiic energy is also increasing.</span><span>
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</span><span>The option D: H2O(l) at 20°C changes to H2O(l) at 10°C corresponds to a decrease of the kinetic energy, since the temperature is decreasing.
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Answers:
1. A silver atom would have 47 protons and more neutrons than a cobalt atom and a cobalt atom would only have 27 protons and less neutrons than a silver atom.
2. D. Inert Inert means non-reactive.
3. Neon gas is a Nobel gas on the right side of the periodic table so it is an inert gas and does not react with iron.
4. Mass is neither created or destroyed so as Mr. Carney ran carbon in his body left as carbon dioxide. So the 10 lbs he lost left his body as CO2 through the lungs.
Answer:
A
Explanation:
when certain chemical reactions are occurring, heat is evolved and that is what is termed exothermic reaction.
The element that has been oxidized is Al ( Answer A)
Explanation
if the oxidation number of an element is greater in the product side than the reactant side then the element has lost the electrons . This mean that the element has been oxidized.
Al is oxidized because it move from oxidation state Zero(0) in reactant side to oxidation state 3⁺ in product side.
This implies that Al loses 3 electrons.