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AlexFokin [52]
3 years ago
15

Help!!!!!!!!!!!!Please!!!!!!

Chemistry
1 answer:
larisa86 [58]3 years ago
7 0

Answer:

Explanation:

all the questions on the paper?

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Which central atom hybridization would you expect in the series bh−4, ch4, nh+4?
hoa [83]

Expected:

sp³ in all three molecules.

<h3>Explanation</h3>

The hybridization of the central atom is related to the number of electron domains around that atom.

\begin{array}{c|c|c}\textbf{Number of Electron Domains} & \textbf{Hybridization}&\textbf{Example}\\ 2 & \text{sp} & \text{C as in CO}_2\\ 3 & \text{sp}^{2} & \text{C in H}_2\text{C}=\text{CH}_2\\ 4 &\text{sp}^{3} & \text{C as in CH}_4\end{array}.

What is an electron domain?

  • An atom bonded to the central atom counts as one electron domain. That atom counts as one electron domain regardless of the bond order. One single bond counts as one electron domain. One double bond counts as one electron domain. One triple bond counts as one electron domain.
  • A lone pair of electrons count as one electron domain.

How many electron domains in BH₄⁻, CH₄, and NH₄⁺?

  • BH₄⁻: Four H atoms are bonded to the central B atom. That ensures an octet for the central B atom. No lone pairs are needed. Four electron domains from the four bonded atoms. sp³ hybridization.
  • CH₄: Four electrons domains with four H atoms and no lone pair. sp³ hybridization.
  • NH₄⁺: Four electrons with four H atoms and no lone pair. sp³ hybridization.
6 0
2 years ago
Which of the following correctly describes an Arrhenius acid?
ValentinkaMS [17]

Answer:

D.

Explanation:

An Arrhenius acid is a compound that increases the H+ ion concentration in a water solution.

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1 year ago
Which is a discontinued variation: height, eye colour or weight
Natasha2012 [34]

Answer:

Eye colour

Explanation:

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2 years ago
A fault cuts across several layers of rock. Which conclusion can be made?(1 point)
xxTIMURxx [149]

Answer: The fault is younger than the layers of rock, according to the law of crosscutting.

Explanation:

Then Law of Crosscutting which was described by James Hutton explains that whenever a fault is seen on a rock, the fault will always be younger than the rock it is one.

This makes sense because if there was no rock in the first place, the fault would not have cut through it. But because there was a rock and an object exacted a force in order to move through the rock, the fault appeared showing that the rock came first, then came the fault.

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(NEED HELP ASAP) Which statement best describes a key difference between a solar and lunar eclipse?
Ira Lisetskai [31]

Answer:

a

Explanation:

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3 years ago
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