How are individual atoms of oxygen formed in the stratosphere?

Which statement best describes the he properties of iconic compounds ?

Aparticular radioactive nuclide has a half-life of 1000 years. what percentage of an initial population of this nuclide has decayed after 3500 years?

Type the correct answer in the box. express your answer to three significant figures. an empty water bottle is full of air at 15°c and standard pressure. the volume of the bottle is 0.500 liter. how many moles of air are in the bottle? the water bottle contains mole of air.