2 CH 14 (1) + 19 O2 (g) – 12 CO2 (g) + 14 H2O (9)
If 77.5 g of hexane (C6H14) react,

how many grams of O2 are needed for the reaction to becompleted?

How many liters of water vapor can be produced if 108 grams of methane gas (ch4) are combusted at 312 k and 0.98 atm? show all work. pls ! will mark as brainliest

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

What volume would 2.25 moles of ne has occupy at stp?