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Rudiy27
3 years ago
8

An administrator in a very large company wants to estimate the mean level of nitrogen oxides (NOX) emitted in the exhaust of a p

articular car model in their very large fleet of cars. Historically, nitrogen oxide levels have been known to be Normally distributed with a standard deviation of 0.15 g/ml. What is the parameter of interest that the administrator wants to estimate?
Chemistry
1 answer:
Dima020 [189]3 years ago
7 0

Answer:

Explanation:

For very well describe a normal distribution, it is needed the mean and the standard deviation. We are only lacking the mean to properly describe the nitrogen levels emitted by the vehicles. He would like to measure the emitted NOX so he could properly model this phenomena.

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How many electrons are transferred during the formation of one molecule of al2o3?
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Answer:
            Six electrons are transferred in the formation of Al₂O₃.

Explanation:
                   Aluminium metal and Oxygen react to form Al₂O₃ as,

                                2 Al  +  3/2 O₂    →    Al₂O₃

Oxidation number of Al on left hand side is zero, while than on right hand side in Al₂O₃ is +3. Means it has lost 3 electrons per one atom and six electrons per two atoms. Also, the oxidation number of O at left hand side in O₂ is zero, while that in Al₂O₃ it is -2 per atom and -6 per 3 atoms. 

So, two Al atoms have lost 6 electrons and 3 O atoms have gained six electrons.
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3 years ago
Oxygen, with an atomic number of 8, is a neutral atom and would have ___________ electrons in the first electron shell and _____
motikmotik
2 in the first shell and 6 in the second
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3 years ago
Give the name for the molecular compound with the the formula P2I4.​
jenyasd209 [6]

Answer:

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3 0
3 years ago
Read 2 more answers
G What is the hybridization of the central atom in the chlorotetrafluoride cation
ivann1987 [24]

Answer : The hybridization of the central atom chlorine is, sp^3d

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 given molecules.

The given molecule is chlorotetrafluoride cation, ClF_4^+

As, the chlorine is more electropositive than the fluorine. So, chlorine is a central atom and fluorine is neighboring atoms.

\text{Number of electrons}=\frac{1}{2}\times [7+4-1]=5

The number of electron pair are 5 that means the hybridization will be sp^3d and the electronic geometry of the molecule will be trigonal bipyramidal.

But as there are 4 atoms around the central chlorine atom, the 5th 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 sea-saw.

Hence, the hybridization of the central atom chlorine is, sp^3d

7 0
4 years ago
What is pollution ? briefly<br><br>​
Marrrta [24]

Answer:

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Explanation:

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