How many moles of methane gas are present in 425 L of the gas? Round answer to 3 significant figures.

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

Classify this reaction: 2al+n2-> aln.

Displacement is the slope of a velocity vs. time graph a. true b. false