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Answer 1

Answer:

D) Mountaineers carry oxygen cylinder with, them when climbing up on the mountains as in high altitude areas the density of air becomes less and it becomes difficult for breathing so mountaineers carry oxygen cylinder with them while climbing on the mountains.

E) (i) Standard Temperature in degree Celsius = 0°C

Standard Temperature in degree Kelvin = 273.15°K

(ii) Standard Pressure in atm = 14.6956 psi

Standard Pressure in Cm Hg = 76 centimeters of mercury

Standard Pressure in torr = 760 torr