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

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 =

                         = 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 =

                         = 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 =

                         = 27.99 kPa

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

the answer is na (sodium)

since electrons are negative the answer is neagtaive