Histamine is a substance that is released by cells in response to injury, infections, stings and stuff that cause allergic responses, such as pollen.
Histamine causes dilation of blood vessels and swelling due to
accumulation of fluid in the tissues. People sometimes take antihistamine
drugs to counteract the effects of histamine. A sample of histamine having
a mass of 0.367 g is composed of 0.190 g of carbon, 0.031 g of hydrogen
and 0.146 g of nitrogen. What is its empirical formula?

the emperical formula if histame is

Explanation:

C5H9N3

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.