Awater molecule is composed of a large oxygen atom bonded to two small hydrogen atoms. which of the following would make the best model of a water molecule?

a. a drawstring bag filled with blue, green, red, and yellow marbles
b. four index cards printed with either an uppercase or lowercase letter
c. two small, plastic balls attached to a larger plastic ball by toothpicks
d. a large, plastic bucket filled with dirt, dead leaves, and rocks

It takes 945.kj/mol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.

Summarize possible ways in which phases of matter could combine to form a solution.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.