Combined gas law problem: a balloon is filled with 500.0 ml of helium at a temperature of 27 degrees celsius and 755 mmhg. as the balloon rises in the atmosphere, the pressure and temperature drop. what volume will it have when it reaches an altitude where the temperature is -33 degrees celsius and the pressure is 0.65 atm?

Write the symbol for every chemical element that has atomic number greater than 3 and atomic mass less than 12.0 u.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.