Iwill give u some coal emits sulfur when it is burned. why is this a problem? a. sulfur is black and coats surfaces with black dust. b. sulfur forms sulfur dioxide, which acts as an air pollutant. c. sulfur produces heat so it needs to remain in the coal. d. sulfur increases the greenhouse effect.

What does the cell nucleus do or, how does it function?

Sodium nitrite (nano2) reacted with 2−iodooctane to give a mixture of two constitutionally isomeric compounds of molecular formula c8h17no2 in a combined yield of 88%. draw reasonable structures for these two isomers. click the "draw structure" button to launch the drawing utility. place the two compounds in the appropriate boxes below.

Astudent is trying to create a table that compares hypotheses, theories, and laws. hypothesis theory law do scientific researchers formulate it? yes yes yes does it explain why things happen? yes yes no yes yes yes is it used to make predictions? no yes yes which of the following questions would most likely fill the blank in the table? is it an intelligent guess? is it newly formulated? is it based on observations? has it been proved?