Gaseous methane CH4 will react with gaseous oxygen O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. Suppose 7.54 g of methane is mixed with 12. g of oxygen. Calculate the minimum mass of methane that could be left over by the chemical reaction. Round your answer to 2 significant digits.

its first and third is your answer i did the qustion the fourth isnt right

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.