Calculate the mass in grams of each sample. Express your answer using two significant figures.
A.4.88x10^20 H2O2 molecules
B. 2.1x10^22 SO2 molecules
C. 5.3x10^25 O3 molecules
D. 9.12x10^19 CH4 molecules

What tactic did palestinians use against israel in 1987

Aclaim about history is most likely not valid if it has which of these characteristics?

Hey!me its for an important test! ! which issue during the progressive era would most likely have united mary harris "mother” jones and lewis hine? a) ending child labor b) regulating monopolies c) using photography to expose poor working conditions d) exposing the lack of jobs available for untrained laborers