1.9 2.
Hydrocarbons are compounds consisting of carbon and hydrogen atoms only.
Calculate a) the empirical formula and b) the molecular formula of a hydrocarbon with
a relative molecular mass of 30, and which contains 80% carbon.

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer

1/0.14nm = 10^10/1.4 a lot