A sample of 4.00 mL diethylether (C2H5OC2H5 ; density 0.7134 g/mL) is introduced into a 5.00 L vessel
that already contains a mixture of O2 (PO2 =0.208 atm)
and N2 (PN2 = 0.751 atm). The temperature is held at
35.0oC and the diethylether totally evaporates.
Calculate (a) the partial pressure of the diethylether;
and (b) the total pressure in the container.

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

No one can answer this im sorry

Starsstars are giant balls of hot gases that can produce their own light. stars give out energy by converting hydrogen gas into helium in their cores. stars are gigantic in size and have immense gravitational attraction. the sun is a medium sized star that gives us energy and makes life on earth possible.planetsplanets are large (almost) spherical objects that revolve around the sun. planets move in fixed orbits around the sun. there are 8 planets in our solar system. planets may be made of rocks, metals, gases like hydrogen, nitrogen and methane. the earth is also a planet and is the only place in the universe that we know that supports life. planets that revolve around other stars are called exoplanets.satellitessatellites are objects that revolve around planets. they form the essential part of the celestial bodies. these may be of natural origin or sent by humans. the moon is a natural satellite of the earth and revolves around it because it is bound by the earth’s gravitational pull. man also has placed artificial or man-made satellites around the earth and other planets to study them and for communication purposes.i think this is correct not 100%