Chemistry, 25.03.2020 16:52 Jadaflournoy5

The average barometric pressure at an altitude of 10 km is 210 mm Hg. Express this pressure in atmospheres, bars and kilopascals

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Answer from: serenityarts123

Answer : The pressure in atmospheres, bars and kilopascals is, 0.276 atm, 0.279 bar and 27.99 kPa respectively.

Explanation :

As we are given that the barometric pressure is, 210 mmHg.

Now we have determine the pressure in atmospheres, bars and kilopascals.

Conversions used for pressure :

1 atm = 760 mmHg

1 atm = 101.325 kilopascals (kPa)

1 atm = 1.01325 bar

First we have to determine the value of pressure in terms of atmosphere.

As, 760 mmHg = 1 atm

So, 210 mmHg = $\frac{210mmHg}{760mmHg}\times 1atm$

= 0.276 atm

Now we have to determine the value of pressure in terms of bars.

As, 760 mmHg = 1.01325 bar

So, 210 mmHg = $\frac{210mmHg}{760mmHg}\times 1.01325bar$

= 0.279 bar

Now we have to determine the value of pressure in terms of kilopascals.

As, 760 mmHg = 101.325 kPa

So, 210 mmHg = $\frac{210mmHg}{760mmHg}\times 101.325kPa$

= 27.99 kPa

Therefore, the pressure in atmospheres, bars and kilopascals is, 0.276 atm, 0.279 bar and 27.99 kPa respectively.

Answer from: Quest

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is $1s^{2}2s^{2}2p^{6}3s^{1}$ and electronic configuration of phosphorous is $1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}$ .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

$3na + p \rightarrow na_{3}p$

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

Electrons are transferred from atoms of to atoms of this transfer makes the sodium atoms and the

Answer from: Quest

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

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The average barometric pressure at an altitude of 10 km is 210 mm Hg. Express this pressure in atmos...