The volume composition of air at sea level has been reported to be as follows: nitrogen 78.084%; oxygen 20.9476%; argon 0.934%; carbon dioxide 0.0314%; neon 0.001818%; methane 0.0002%; helium 0.000524%; krypton 0.000114%; hydrogen 0.5%; xenon 0.87%; ozone 0.7%; nitrogen dioxide 0.2%; and iodine 0.1%. , compute the molar mass of air, in [kg/mol] based on this composition.

It is 4.92 e-4 sorry if i am wrong

True or false:   the purpose of a defense mechanism is to get uncomfortable feelings out into the open so they can be dealt with in a healthy manner.indeed true: )

For lesson: cameras, plant presses, newspaper, paper towels, clip boards, pencils, calculators, field guides, metric measuring tapes, paper, transect squares, colored pencils, ph meters, light meters, computers, etc.for extension: baggies for soil samples collecting, distilled water, hand shovels, beakers, boiled rice, microscopes, well microscope slides or regular microscope slides with cover slips

When china's civil war resumed, the nationalists held an advantage because the nationalist had more soldiers  than the communist.