Use dimensional analysis to perform the following calculations. Show K, U, and plan! Use correct sig figs and units! 3. How many mL are equal to .0024 L?
4. How many km are equal to 1.55 x 10^4 m?
5. How many mm are equal to 4.75 x 10^-2 m?

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.