<span>One degree Celsius indicates the same temperature change as one </span>
10 decigrams are equivalent to 1 gram, so 2,100 grams are equivalent to 2100 x 10. This makes 21,000.
Answer:
the weight of the atmosphere pressing down on Earth
Answer: <span>O₂(g), Br₂(l) Fe(s), He(g)
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Justification:
1) The state variable given, ΔHf°, is <span>the standard
enthalpy of formation. By definition it is the change in the enthalpy that accompanies the
formation of a mole of compound in the standard state, from its
constituent elements in the standard state.
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2) Since the standard state of <span>O₂(g), Br₂(l) Fe(s), He(g) is the very same shown, they do not evolve any heat for its formation. This is, that is the same state of the constituents, and no change is involved.
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<span>That is why, </span><span>ΔHf°, of those elements is 0.
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The answer is 656.18
6.02 x 109 = 656.18
