<span>Gills enhance diffusion between aquatic creatures' blood and the surrounding water. They have a large surface area to increase the area available for gas exchange and a lot of capillaries to increase the bloodflow through the gills. The cells in the capillaries are flattened, which further increases their surface area and the rate of gas exchange.</span>
Answer:
a
Explanation:
the total amount of solar energy that reaches the earth is too low to be useful
The mass of 3.41×10²⁴molecules of propylamine is 33.45 gms.
<h3>What is avogador's no. ?</h3>
Avogadro's number, the number of units in one mole of any substance (defined as its molecular weight in grams), is equal to 6.02214076 × 10²³.
<h3>How to determine the molar mass of compound ? </h3>
To this problem we first need to calculate the molar mass of the given compound. as follows:
3×12+1×9+1×14 = 59
In the next step, we simply apply the formula to calculate the mass of the compound. it is
No. of molecules ÷ Avogadro's no. × molar mass of the compound
3.41 x 10²⁴÷6.02×10²³×54= 33.43gms
Hence, the mass of 3.41×10²⁴molecules of propylamine is 33.45 gms.
Learn more about Avogadro's no. here: brainly.com/question/1581342
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