Which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 2.7 x 10^24 27 x 10^23 2.71 x 10^24 27.099 x 10^23

Select the correct answer.the gas in a sealed container has an absolute pressure of 125.4 kilopascals. if the air around the container is at a pressure of 99.8 kilopascals, what is thegauge pressure inside the container?