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Stels [109]
3 years ago
9

When bar-headed geese fly at very high altitudes (possibly over Mount Everest!), they breathe very thin air where the partial pr

essure of oxygen is very low compared to that at sea level. Which of the following adaptions would help the geese efficiently exchange gases when flying at high altitudes? ______
A) hemoglobin that has a high affinity for oxygen
B) hemoglobin that has a high affinity for carbon dioxide
C) hemoglobin that has a low affinity for carbon dioxide
D) hemoglobin that has a low affinity for oxygen
Chemistry
1 answer:
Reil [10]3 years ago
5 0

Answer:hemoglobin that has a high affinity for oxygen

Explanation:

Haemoglobin is the oxygen carrying pigment in blood. It performs this function because of the presence of iron at the center of the haemoglobin which coordinates reversibly with oxygen thereby aiding delivery of oxygen to cells. At high altitudes where air is thinner and the partial pressure of oxygen is lower than sea level, haemoglobin must develop a greater affinity for oxygen in order to carry the scarce oxygen to cells.

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Chlorine can be prepared in the laboratory by the reaction of manganese dioxide with hydrochloric acid, HCl ( aq ) , as describe
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Answer:

0.9483 grams of manganese dioxide should be added to excess HCl.

Explanation:

Pressure of the chlorine gas = P = 795 Torr = 1.046 atm  (1 atm = 760 Torr)

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Temperature of the chlorine  gas = T = 25°C= 298.15 K

Moles of chlorine gas = n

Using ideal gas equation:

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Then 0.01090 moles of chlorine gas will be obtained from:

\frac{1}{1}\times 0.01090 mol=0.01090 mol manganese dioxide

Mass of 0.01090 moles of manganese dioxide:

0.01090 mol × 87 g/mol = 0.9483 g

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