. A sample of a gas is compressed from a volume of 2.50 L to 925 mL under constant temperature.
Its initial pressure was standard ambient pressure - calculate the resulting pressure (in kPa).

How has the scientific community addressed the safety of chemicals? a. chemicals are repeatedly tested, even those that have existed for a long time. b. existing chemicals are tested if they have never been tested before. c. chemicals are tested if they are suspected to have caused a problem. d. only new chemicals are tested.

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

How to convert a density of 0.791g/cm3 to lb/ft3