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ikadub [295]
3 years ago
9

A box has dimensions: l = 10.0 cm; w = 5.0 cm; h = 2.5 cm determined by a mm ruler. Calculate

Chemistry
1 answer:
olga55 [171]3 years ago
7 0

Answer:

Volume of box =  125 cm³

Explanation:

Given:

Length l = 10 cm

Width b = 5 cm

Height h = 2.5 cm

Find:

Volume of box

Computation:

Volume of box = lbh

Volume of box = 10 x 5 x 2.5

Volume of box =  125 cm³

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Sort these species into isoelectronic groups. It doesn\'t matter which group goes in which box, so long as the correct species a
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Answer : The isoelectronic groups are:

He,Be^{2+},Li^{+}

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Explanation :

Isoelectronic : It is defined as the compound or molecule having the same number of electrons and the same number of electronic structure.

  • The element is helium. The number of electrons are 2.
  • The element is beryllium. The number of electrons are 4. The number of electrons in Be^{2+} = 4 - 2 = 2
  • The element is lithium. The number of electrons are 3. The number of electrons in Li^{+} = 3 - 1 = 2
  • The element is nitrogen. The number of electrons are 7. The number of electrons in N^{3-} = 7 + 3 = 10
  • The element is neon. The number of electrons are 10.
  • The element is sulfur. The number of electrons are 16. The number of electrons in S^{2-} = 16 + 2 = 18
  • The element is magnesium. The number of electrons are 12. The number of electrons in Mg^{2+} = 12 - 2 = 10
  • The element is titanium. The number of electrons are 22. The number of electrons in Ti^{4+} = 22 - 4 = 18
  • The element is potassium. The number of electrons are 19. The number of electrons in K^{+} = 19 - 1 = 18

The isoelectronic groups are:

He,Be^{2+},Li^{+}

N^{3-},Mg^{2+}

S^{2-},Ti^{4+},K^{+}

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