The concentration of ethyl alcohol in a typical molecular cloud is one molecule per 108 cubic meters. What is the volume of a cloud you would need to make a martini (10 grams)? The molecular weight of a ethyl alcohol is 46 which means that an Avogadro number (6 x 1023) of molecules weighs 46 grams.

Which of these is the result of scientific research and not engineering? a. a new shoe design that features air cushioning for more comfort and protection b. the creation of glass with uv protection. c. a conclusion about diet commonalities among diabetics. d. the development of a smaller, more compact missile.

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

Astudent conducts an experiment to determine how the amount of water given to a plant affects its growth. what is the independent variable for this experiment?