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3 years ago

Please help i will reward brainly! ASAP

Chemistry

1 answer:

Svet_ta [14]3 years ago

7 0

I believe the correct answer is Newtons hope this helps:)

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How does the electric force vary with distance

Yanka [14]

Answer:

increasing the separation distance between objects decreases the force of attraction

Explanation:

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3 years ago

When does heat naturally move from cooler objects to warmer objects

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3 years ago

Hich one of the following statements about orbital hybridization is incorrect?

photoshop1234 [79]

Answer : The incorrect statement is, (C) The nitrogen atom in NH₃ is sp² hybridized.

Explanation :

Formula used :

$\text{Number of electron pair}=\frac{1}{2}[V+N-C+A]$

where,

V = number of valence electrons present in central atom

N = number of monovalent atoms bonded to central atom

C = charge of cation

A = charge of anion

Now we have to determine the hybridization of the following molecules.

(a) The given molecule is, $CH_4$

$\text{Number of electrons}=\frac{1}{2}\times [4+4]=4$

The number of electron pair are 4 that means the hybridization will be $sp^3$ and the electronic geometry of the molecule will be tetrahedral.

(b) The given molecule is, $CO_2$

$\text{Number of electrons}=\frac{1}{2}\times [4]=2$

The number of electron pair are 2 that means the hybridization will be $sp$ and the electronic geometry of the molecule will be linear.

(c) The given molecule is, $NH_3$

$\text{Number of electrons}=\frac{1}{2}\times [5+3]=4$

The number of electron pair are 4 that means the hybridization will be $sp^3$ and the electronic geometry of the molecule will be tetrahedral.

But as there are 3 atoms around the central nitrogen atom, the fourth position will be occupied by lone pair of electrons. The repulsion between lone and bond pair of electrons is more and hence the molecular geometry will be trigonal pyramidal.

(d) sp² hybrid orbitals are coplanar, and at 120° to each other.

The sp² hybrid orbitals has trigonal planar geometry and are in the same plane that means coplanar. Thus, the bond angle is 120° to each other.

(e) sp hybrid orbitals lie at 180° to each other.

The sp hybrid orbitals has linear geometry. Thus, the bond angle is 180° to each other.

Hence, the incorrect statement is, (C) The nitrogen atom in NH₃ is sp² hybridized.

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3 years ago

Name two other elements that have properties that are similar to those of the element rubidium and why would they.

Andrei [34K]

Answer is potassium and sodium. They are in the same group and that means they have the same properties. They are all alkali metals

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3 years ago

What safety precautions should you take when the following safety symbols are listed?

Sav [38]

It means that you have to protect your hand.with gloves

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3 years ago