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svlad2 [7]
3 years ago
5

A compound has the formula c8h8 and does not contain any double or triple bonds. all the carbon atoms are chemically identical a

nd all the hydrogen atoms are chemically identical. draw a lewis structure for this molecule.
Chemistry
1 answer:
Anastasy [175]3 years ago
5 0
<span>Answer: Cubane, C8H8 It "sorta" looks like this. ....H.........H ......\......../ H.....C - C ...\../.|.../.| ....C - C.C- H .... |.....|./ ....C - C .../.........\ H............H Imagine a cube of carbon atoms, with a single hydrogen attached at each of the 8 corners. That way we have complete symmetry, since all of the bonds, carbons and hydrogens have the identical environment.</span>
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2Pb(s) + O2(aq) + 4H+(aq) → 2H2O(l) + 2Pb2+(aq)
defon

Answer:

The answer to your question is 0.269 g of Pb

Explanation:

Data

Lead solution = 0.000013 M

Volume = 100 L

mass = 0.269 g

atomic mass Pb = 207.2 g

Chemical reaction

                        2Pb(s) + O₂(aq) + 4H⁺(aq) → 2H₂O(l) + 2Pb₂⁺(aq)

Process

1.- Calculate the mass of Pb in solution

Formula

Molarity = \frac{number of moles}{volume}

Solve for number of moles

Number of moles = Volume x Molarity

Substitution

Number of moles = 100 x 0.000013

Number of moles = 0.0013

2.- Calculate the mass of Pb formed.

                       207.2 g of Pb ----------------- 1 mol

                             x g             ----------------- 0.0013 moles

                        x = (0.0013 x 207.2) / 1

                        x = 0.269 g of Pb                                                                

8 0
3 years ago
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What’s the equation for
rosijanka [135]
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4 0
3 years ago
Which unit represents 100 meters?
adell [148]

Answer:

Hectometer.

Explanation:

  • <u><em>Hecto- means 100; a hectometer is 100 meters.</em></u>
6 0
3 years ago
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Which of the following would be an example of an amorphous solid?
sveticcg [70]

I think B. because of this picture??

3 0
3 years ago
Balance the following redox equation using the smallest integers possible and select the correct coefficient for the hydrogen su
goldfiish [28.3K]

Answer:

Coefficient of HSO_{3}^{-} is 5

Explanation:

Oxidation: MnO_{4}^{-}(aq)\rightarrow Mn^{2+}(aq)

  • Balance O and H in acidic medium: MnO_{4}^{-}(aq)+8H^{+}(aq)\rightarrow Mn^{2+}(aq)+4H_{2}O(l)
  • Balance charge : MnO_{4}^{-}(aq)+8H^{+}(aq)+5e^{-}\rightarrow Mn^{2+}(aq)+4H_{2}O(l) .............(1)

Reduction: HSO_{3}^{-}\rightarrow SO_{4}^{2-}

  • Balance O and H in acidic medium : HSO_{3}^{-}(aq)+H_{2}O(l)\rightarrow SO_{4}^{2-}(aq)+3H^{+}(aq)
  • Balance charge : HSO_{3}^{-}(aq)+H_{2}O(l)-2e^{-}\rightarrow SO_{4}^{2-}(aq)+3H^{+}(aq) ..............(2)

[2\times eq(1)]+[5\times eq(2)] -

Balanced equation: 2MnO_{4}^{-}(aq)+5HSO_{3}^{-}(aq)+H^{+}(aq)\rightarrow 2Mn^{2+}(aq)+5SO_{4}^{2-}(aq)+3H_{2}O(l)

Coefficient of HSO_{3}^{-} is 5

8 0
3 years ago
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