The volume of a sample of helium is 4.5 mL at 15.0°C and 215.0 kPa. What will its final volume be in the figure if the final pressure is 205 kPa and the final temperature is 20°C 4.8 mL​

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Which object forms when a supergiant runs out of fuel? a red giant a black hole a white dwarf a neutron star

What can be found in the ionosphere