You have just landed on a strange, NEW planet. Your intrigue has led you to coll

Question

You have just landed on a strange, NEW planet. Your intrigue has led you to collect and analyze a gas sample. Below are the results of your analysis, use this data to answer questions 16-18. PO2 = 187 mmHg PCO2 = 20 mmHg PH2O = 0 mmHg PN2 = 15 mmHg What is the total pressure in the surrounding environment and what gas law did you use to arrive at your answer? A. 222 mmHg, Boyle's law B. 760 mmHg, Dalton's law C. 760 mmHg, Boyle's law D. 222 mmHg, Dalton's law What is the percentage of O_2 on this NEW planet? A. 20.93% B. 84.2% C. 118% D. not enough information to tell How would the Hb-saturation curve shift if a person from earth were to breathe this planet's atmosphere? A. Bohr shift to the left, increasing O_2 unloading B. Bohr shift to the right, decreasing O_2 unloading C. Bohr shift to the left, decreasing O_2 unloading D. Bohr shift to the right, increasing O_2 unloading

Explanation / Answer

16. Partial pressure is the pressure shown by a particular gas in mixture of gases. Partial pressure of gases is equivalent to concentration in case of solids and liquids.

Partial pressure calculated by P = n RT / V formula

Total pressure of the Gas mixture = sum of the partial pressures of all individual gases of a gas mixture

It stated by Dalton

So Answer is D

17. As the partial pressure is a quantitative property, the number of gas molecules is proportional to the pressure. more pressure, more molecules and more percentage. So percentage of Oxygen in the new planet is = (187 / 222) x 100

= 84.23%

So Answer is B

18. Answer is B. Due to high oxygen concentration, the curve shift to the right and decreasess oxygen unloading.

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