if it takes 0.5L of oxygen gas is kept in a cylinder under pressure to fill an evacuated 4.0L vessel in which the pressure is 0.98 atm, what was the initial pressure of the gas in the cylinder?

the correct answer would be d. hope this !

idk what the question is about

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.