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bonufazy [111]
1 year ago
5

Which of the following atoms has the least metallic character?

Chemistry
1 answer:
ANEK [815]1 year ago
7 0

Answer:

The least metallic or most non-metallic element is fluorine.

Explanation:

hope this helps

pls mark brainliest

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Briefly explain why there is a constant temperature plateau in the cooling curve
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Use the formation reactions below such that when added together, they match the balanced equation for the combustion of methane.
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Answer:

ΔH of the reaction is -802.3kJ.

Explanation:

Using Hess's law, you can know ΔH of reaction by the sum of ΔH's of half-reactions.

Using the reactions:

<em>(1) </em>Cgraphite(s)+ 2H₂(g) → CH₄(g) ΔH₁ = −74.80kJ

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The sum of (2) - (1) produce:

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And the sum of this reaction with 2×(3) produce:

CH₄(g) + 2 O₂(g) → CO₂(g) + 2H₂O(g) And ΔH = -318.7kJ + 2×(-241.80kJ) =

<em>-802.3kJ</em>

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3 years ago
explain why it is a common laboratory procedure to heat analytical reagents and store them in a dessicated atmosphere (a sealed
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Explanation:

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Heating will help to eliminate water, although some chemicals don't react well to heat, so it shouldn't be used for all.  A dessicated environment is simply a means to  "dry."  That allows the reagent with little water in the air to attach with.

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