A sample of gaseous hydrogen has 7.46 x 1023 molecules. How many moles of gas are in the sample

What is the atomic number of an atom that has 6 protons

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).

What is the difference between skimming and absorbing methods of the oil removal