What is the average speed of the smallest molecular weight gas in the graph shown below? 0.004 0.003 Probability density (s/m) 0.002 0.001 0 500 1000 1500 2000 2 Speed (m/s) O 250 m/s 500 m/s 400 m/s 1100 m/s​

Infants born with severe respiratory problems are sometimes given liquid ventilation: they breathe a liquid that can dissolve more oxygen than air can hold. one of these liquids is a fluorinated compound, cf3(cf2)7br. the solubility of oxygen in this liquid is 66 mlo2 per 100 ml liquid. in contrast, air is 21 % oxygen by volume. calculate the moles of o2 present in an infant's lungs (volume: 12 ml ) if the infant takes a full breath of air. assume a pressure of 1 atm in the lungs.

One similarity and one difference between an element and a mixture of elements

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.