What would have been the initial pressure reading of a sample of oxygen gas that started at 25.0 ml in volume and was compressed to 15.0 ml? the final pressure reading was 1.90 atm. (temperature was kept constant.)

1. list three scientific reasons cockroaches may fly.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.