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jarptica [38.1K]
3 years ago
9

Atomic Size: Determine which of the following element pairs is the larger one

Chemistry
1 answer:
aleksklad [387]3 years ago
4 0

Answer: I think the answer is 3.) Krypton or Argon.

Explanation:

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The H⁺ concentration in an aqueous solution at 25 °C is 9.1 × 10⁻⁴. What is [OH⁻]?
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Steps:-

  • First we calculate pH then pOH then [OH-]

\\ \tt\rightarrowtail pH=-log[H^+]

\\ \tt\rightarrowtail pH=-log[9.1\times 10^{-4}]

\\ \tt\rightarrowtail pH=-log9.1-log10^{-4})

\\ \tt\rightarrowtail pH=0.95+4

\\ \tt\rightarrowtail pH=4.95

Now

\\ \tt\rightarrowtail pH+pOH=14

\\ \tt\rightarrowtail pOH=14-4.95

\\ \tt\rightarrowtail pOH=9.05

So

\\ \tt\rightarrowtail -log[OH^-]=9.05

\\ \tt\rightarrowtail log[OH^-]=-9.05

\\ \tt\rightarrowtail OH^-=10^{-9.05}

\\ \tt\rightarrowtail OH^-=8.91\times 10^{-4}

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The Second Law of Thermodynamics assures us that:
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Electrons should orbit indefintely because an electron cannot collide with a nucleas it has never happen as well as it is predicted to never happen
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Write the net ionic equation for the reaction that occurs when a solution of hydrochloric acid (hcl) is mixed with a solution of
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Ionic Equation:
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Net ionic equation:
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Answer/ explanation :

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In this model of a molecule of ammonia, nh3, how many covalent bonds are represented? ammonia
motikmotik
I don't know but I would pick b.2.covalent bonds
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