He concentration of the appetite-regulating hormone ghrelin is about 1.3 × 10-10 m in the blood of a fasting person. how many molecules of ghrelin are in 1 l of blood?

To solve this problem, let us first calculate for the number of moles of ghrelin in the blood. This is calculated by using the formula:

number of moles of ghrelin = Molarity * Volume of blood

number of moles of ghrelin = (1.3 × 10^-10 mol / L) * (1 L)

number of moles of ghrelin = 1.3 × 10^-10 mol

 

Avogadro’s number states that for every mol of a substance there is approximately 6.022 x 10^23 atoms or molecules of that substance. Therefore converting this into number of molecules:

number of molecules of ghrelin = 1.3 × 10^-10 mol (6.022 × 10^23 molecules / mol)

number of molecules of ghrelin = 7.8286 × 10^13 molecules

Where are the questions

I’d have to say no because without oxygen in the water the fish would all be dead. so if you want to fish for dead fish, pick the ponds with the lowest oxygen concentrations.