Given the following chemical reaction: 2 o2 + ch4 --> co2 + 2 h2o
what mass of oxygen is required to completely react with 2 moles of ch4?
a)77 grams o2
b) 98 grams o2
c) 128 grams o2
d) 144 grams o2

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

Explain that newton first law,second law and third law of motion?