How many atoms are in each elemental sample? Express your answer using two significant figures.
A. 4.8 mol Cu
B. 5.6x10^-3 mol C
C. 20.0 mol Hg
D. 0.285 mol Na

Which historical detail can best clarify a reader’s understanding of the information in the excerpt? immigrant factory workers who spoke the same language were separated from each other at work. immigrant factory workers who spoke the same language were known to talk too much at work. immigrant factory workers had to pay rent for their chairs and the supplies they needed at work. immigrant factory workers were crowded into unsafe buildings with locked doors and fire escapes.

How did the english teacher ponyboy? the outsiders

Which sentence contains the central claim in "compulsory voting: an idea whose time has come" by tor hunter?