What mass of oxygen is required to completely react with 2 moles of ch4

The mass of oxygen that is required to react completely with 2 moles of CH4 is 128 grams

calculation

mass = moles xmolar mass

The molar mass of O2= 16 x2 = 32 g/mol

find the number of moles

first write the the equation for reaction

CH4 + 2O2 → CO2 + 2H2O

the mole ratio between CH4 to O2 is 1:2 therefore the moles of O2 = 2 x2 = 4 moles

mass is therefore = 32 g/mol x 4 moles = 128 grams

i'm not sure

explanation:

i'll try whatever you got

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."