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?

Asample of neon occupies a volume of 375 ml at stp. what will be the volume of neon if the pressure is reduced to 90.0 kpa? a. 422 ml b. 422 l c. 333 ml d. 333 l

Will give ! what are the advantages and disadvantages of nuclear power? check all that apply. one advantage of nuclear energy is that it does not produce carbon dioxide emissions. storage of nuclear waste is a short-term problem associated with nuclear energy. the problem with uranium mining is that a large quantity of uranium must be extracted to meet energy needs because the energy release from uranium fission is so low. safe operation of a nuclear power plant can be jeopardized by a human mistake.

Particles vibrate in a rigid structure and do not move relative to their neighbors.