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3 years ago

Which of the following is not a diatomic molecule? nitrogen hydrogen bromine helium

Chemistry

2 answers:

Nikitich [7]3 years ago

7 0

Answer: Option (d) is the correct answer.

Explanation:

When two atoms are bonded together then it is known as a diatomic molecule.

Such as nitrogen exists as $N_{2}$ molecule in atmosphere so, it is a diatomic molecule.

Hydrogen also exists as $H_{2}$ molecule in atmosphere so, it is also a diatomic molecule. Also, bromine is a diatomic molecule because it exists as $Br_{2}$ molecule into the atmosphere.

But helium exists as He molecule as it has 2 electrons so, as per the octet rule it's s-shell is completely filled. Hence, it is stable and exists as a monoatomic molecule into the atmosphere.

Thus, we can conclude that out of the given options, helium is not a diatomic molecule.

vovangra [49]3 years ago

7 0

Answer: Helium

Explanation:

Diatomic molecule is one which is formed by the combination of two atoms.

Nitrogen exists as $N_2$ in atmosphere, Hydrogen exists as $H_2$ in atmosphere, Bromine exists as $Br_2$ in atmosphere and Helium exists as He in atmosphere.

Helium being a inert gas or noble gas do not combine with another atom as its octet is already complete and thus it is unreactive.

He with atomic number 10 has following configuartion:- $1s^22s^22p^6$

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3 years ago

Which explains why krypton was most likely given this name

slavikrds [6]

Answer:

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Explanation:

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3 years ago

Assuming 100% dissociation, calculate the freezing point and boiling point of 2.60 m K3PO4(aq).

Serga [27]

To find the freezing point, you use the following formula

fp solution= fp solvent - Δfp solution

fp solvent= 0 C (since the solvent was not stated, you can assume is water which freezing point is 0 degree celsius)

but first, we need to find the depression in freezing point (Δfp solution)

Δfp solution= Kf x i x m, where Kf is constant for the solvent, i is the number of particles produced by the solute and m is the molality of the solution.

Kf= 1.86 for water
i= 4 , becausethe solute breaks into 4 ions, K3PO4---> 3K+ + PO4-3
m= 2.60

Δfp solution= (1.86) (4) (2.60)= 19.3 C

fp solution= 0 - 19.3C=<span> -19.3C
</span>

for boiling point, we use a similar formula and way to solve it.

Δbp solution= bp solvent + Δbp solution

bp solvent= 100 C for water

to find the elevation boiling point (Δbp soln) is equal to:

Δbp solution= Kb x i x m

Kb= 0.512
i= 4
m= 2.60

Δbp solution= (0.512) (4) (2.60)= 5.32 C

bp solution= 100C + 5.32C= <span>105.32 C</span>

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4 years ago

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LUCKY_DIMON [66]

air pollution would cause trees to die and animals to die . It would coaus most harm by killing everything on land and in the sea beacuse the animals that die might wash away in the ocean killing other animals slowly but surely. and it doesnt help there is soil erosion sooner rather that later it will turn into nothing.

Explanation:

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3 years ago

When temperature increase gas decrease or increase support u r answer with daily life example

astraxan [27]

Answer:

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Explanation:

dont known reason burr answer is correct

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3 years ago

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