A cylinder with a moveable piston contains 2.0 grams of helium, He at room temperature more helium was added to the cylinder and the volume was adjusted so that gas pressure remained the same. How many grams of helium were added to the cylinder if the volume was changed from 2.00L to 3.50L?

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.