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GREYUIT [131]
4 years ago
15

A phosphorus atom and a chlorine atom are likely to form a covalent bond because both elements:

Chemistry
1 answer:
Nina [5.8K]4 years ago
8 0
Share share extra electrons.
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There are two stable isotopes of bromine. Their masses are 78.9183 and 80.9163 amu. If the average atomic mass of bromine is 79.
tamaranim1 [39]
Probably the answer will be 28.60 because it's a lower number
6 0
3 years ago
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For some hypothetical metal, the equilibrium number of vacancies at 900c is 2.3 1025 m3. if the density and atomic weight of thi
PSYCHO15rus [73]

Hey there!

The number of vacancies per unit volume =>  ( Nv = 2.3*10²⁵ m⁻³ )

Avogrado's number =>  ( NA = 6.022*10²³ atoms/mol )

Density of material ( p )  in g/m³ :

1 g/cm³ = 1000000 g/m³ so:

7.40  * ( 1000000 ) = 7.40*10⁶ g/m³

Atomic mass = 85.5 g/mol

* Calculate the number of atomic sites per unit volume :

N = NA * p / A

N = ( 6.022*10²³ ) * ( 7.40*10⁶ ) / 85.5

N = 4.45*10³⁰ / 85.5

N = 5.212*10²⁸ atoms/m³

Therefore:

Calculate the fraction of vacancies :

Fv =  Nv / N

Fv = 2.3*10²⁵ / 5.212*10²⁸

FV = 4.441*10⁻⁴



Hope that helps!

5 0
3 years ago
Which of the following is true about the behavior of an organism?
Semmy [17]

Answer:

C. The behavior of an organism is not influenced by either its heredity or its environment.

4 0
3 years ago
During the experiment, scientists noted that several of the reaction beakers became hot to the touch. All of the following react
Basile [38]

During the experiment, scientists noted that several of the reaction beakers became hot to the touch. All of the following reactions could cause this result except endothermic and positive ∆H experiments.

<u>Explanation:</u>

If the beakers are becoming hot during experimentation, then that means the energy is being released from the reactants during this experiment. As the energy is being released that enthalpy change will also be negative as the enthalpy change is calculated as the difference of enthalpy of reactants from products.

So in these cases, heat is released making the beakers hot. So for the exceptional case, the experiment should be endothermic in nature and positive enthalpy change should be there in the experiment. Such that the heat will not be released leading to no heating of beakers.

4 0
3 years ago
How many moles are in the number of molecules below? I only need to know the 5th question.
Arada [10]

Answer:

11

1. 6.02×10 23

this is the answer Hope it helps you

4 0
3 years ago
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