Express the answer in scientific notation and with the correct number of significant figures: (6.32 x 10-4) ÷ 12.64

Stage in which a typical star has completely stopped fusion

Hey can you me with this i really need y’all

Butane gas reacts with oxygen gas to give carbon dioxide gas and water vapor (gas). if you mix butane and oxygen in the correct stoichiometric ratio, and if the total pressure of the mixture is 390 mmhg, what is the pressure (in mmhg) of water vapor after the reaction is completed (temperature and volume do not change).