Why can gasses change volume?
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a. there are no forces holding the gas particles together.
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b. the gas particles have no mass, so they can change volume.
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c. the forces holding the gas particles together are stronger than
gravity.
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d. gravity has no effect on gas particles, so they can float away.
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answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation:

the potential energy of the reactants is 200j.

from the energy diagram, the energy of the product formed is 350j; this means that, this reaction is an endothermic reaction, because it absorbs energy from its environment.

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answer; the numbers of valence electrons in the acetic acid molecule (ch3co2h) is 24;